Google images use nearest pixel for searching. Filter won’t do much as google uses shape detection also. Mirror is the most popular method.
1. Use Upscale
2. Flip Vertically then Rotate 180°
3. Flip Horizontally
4. Edit image ”curves”
5. Downscale to preferred size
Just use wiki commons with no restrictions photos.
Ultimately, use your own photos lol as google ai becomes smarter each day. If you are a google photos user, you’ll understand. Google can now analyze objects, letters, and color shades.