Keep adding yours as well. Let's see what I can learn 
1. Database Dumps & Credentials Leaks
filetype:sql "password"
filetype:json "password"
filetype:txt "password"
filetype:log "password" OR "username"
filetype:env "DB_PASSWORD"
filetype:conf "password"
filetype:ini "password"
filetype:sql "insert into users"
filetype:xml "password"
inurl:"wp-config.php" "DB_PASSWORD"
2. Exposed Website Config Files
inurl:".git" "index of"
intitle:"Index of" ".env"
intitle:"Index of" "wp-config.php"
intitle:"Index of" "database.yml"
intitle:"Index of" "settings.py"
intitle:"Index of" "secrets.json"
intitle:"Index of" "config.php"
3. Admin Login Pages
intitle:"Admin Login" inurl:admin
intitle:"Login Page" inurl:login
inurl:"admin/login"
inurl:"administrator/login"
inurl:"admin.php"
inurl:"user/login"
inurl:"backend/login"
4. Unsecured CCTV & Security Cameras
inurl:"top.htm" inurl:"currenttime"
inurl:"viewerframe?mode="
inurl:"view/index.shtml"
intitle:"Live View / - AXIS"
intitle:"webcamXP 5"
intitle:"webcam 7"
inurl:"/view/view.shtml"
5. Open File Repositories (Index of)
intitle:"index of" "backup"
intitle:"index of" "admin"
intitle:"index of" "password"
intitle:"index of" "database"
intitle:"index of" "wp-content"
intitle:"index of" "ftpconfig.json"
6. FTP Servers & Exposed Directories
intitle:"Index of" inurl:ftp
intitle:"Index of /private"
intitle:"Index of /confidential"
intitle:"Index of /database"
7. Exposed Email Lists & User Credentials
filetype:xls "email" "password"
filetype:csv "email" "password"
filetype:txt "email" "password"
filetype:json "email" "password"
filetype:log "email" "password"
8. WordPress Sensitive Information
inurl:"wp-config.php" "DB_PASSWORD"
inurl:"xmlrpc.php" intitle:"Index of"
inurl:"wp-content/debug.log"
intitle:"Index of" "wp-content/uploads"
9. phpMyAdmin & Database Management
intitle:"phpMyAdmin" inurl:"phpmyadmin"
intitle:"MySQL dump" filetype:sql
inurl:"pma/index.php"
inurl:"dbadmin/index.php"
inurl:"admin/phpmyadmin"
10. Open Web Directories with Private Content
intitle:"index of" "backup.zip"
intitle:"index of" "database.sql"
intitle:"index of" "config.php"
intitle:"index of" "sensitive"
intitle:"index of" "htpasswd"
11. Open Routers & Network Devices
intitle:"Router Setup" inurl:setup
intitle:"DVR Login"
intitle:"Network Camera"
intitle:"Webcam" inurl:view
12. Unsecured Git Repositories
intitle:"Index of" ".git"
inurl:".git/config"
inurl:".git/HEAD"
inurl:"/.git/logs/HEAD"
13. Open Jenkins & DevOps Panels
intitle:"Jenkins Dashboard" inurl:"/view/"
inurl:"/jenkins/login"
intitle:"Dashboard" inurl:"/login"
14. Remote Desktop Services (RDP)
inurl:"tsweb/default.htm"
inurl:"rdpweb/default.aspx"
inurl:"rdesktop.html"
intitle:"Remote Desktop Web Connection"
15. Exposed VPN Configurations
filetype:conf "auth-user-pass"
filetype:ovpn "remote"
intitle:"Index of" "openvpn"
16. Public Cloud Storage (AWS, Google, Azure)
site:amazonaws.com "index of"
site:storage.googleapis.com "index of"
site:blob.core.windows.net "index of"
17. Payment Gateways & Invoices
intitle:"index of" "invoice.pdf"
intitle:"index of" "billing"
filetype:pdf "invoice"
18. Exposed API Keys & Tokens
filetype:env "API_KEY"
filetype:json "api_key"
filetype:ini "api_secret"
inurl:"config.json" "API_KEY"
19. Web Shells & Backdoors
intitle:"index of" "c99.php"
intitle:"index of" "r57.php"
inurl:"shell.php"
inurl:"wso.php"
20. Vulnerable Websites (SQLi, LFI, XSS)
inurl:"index.php?id="
inurl:"page.php?id="
inurl:"news.php?id="
inurl:"product.php?id="
inurl:"catalog.php?id="
inurl:"detail.php?id="
inurl:"search.php?q="
21. Webcam Feeds & IP Cameras
inurl:"view/view.shtml"
inurl:"video.mjpg"
inurl:"webcam.html"
inurl:"/axis-cgi/mjpg/video.cgi"
22. Unsecured IoT Devices
inurl:"webadmin/index.php"
intitle:"webadmin" inurl:"admin"
inurl:"/admin/config.php"
23. Logs Containing Sensitive Info
filetype:log "session"
filetype:log "password"
filetype:log "credit card"
24. Misconfigured GitHub Repositories
site:github.com "DB_PASSWORD"
site:github.com "AWS_ACCESS_KEY_ID"
site:github.com "secret_key"
25. Private Corporate Documents
filetype:pdf "confidential"
filetype:docx "internal"
filetype:xlsx "financials"