Building on that, here are some more Google search examples:
1. "firewall" site:concoursmustang.com
Results: all posts that contain the text string "firewall" (on this website)
2. "firewall pad" site:concoursmustang.com
Results: all posts that contain the exact text string "firewall pad" - note that "fire wall pad" would not be in the results due to the space between fire and pad.
3. "fire" "wall" "pad" site:concoursmustang.com
Results: all posts that contain the ALL three text strings, including "firewall pad", "fire wall pad" etc.
4. "front" "bumper" "67|68" site:concoursmustang.com
Results: all posts that contain "front" AND "bumper" AND (67 OR 68)
I have not yet figured out how to, for example, use Google to focus the search in the unrestored pictures section. A use case - let's say I'm looking for examples of an unrestored 1969 car with red interior, or unrestored 1968 car with interior decor.