car engine Find results that contain at least one of the two words.
"car engine" Find results that contain the exact phrase 'car engine'.
+car +engine Find results that contain both words.
car -engine Find results that contain the word 'car' but not 'engine'.
car* Partial match. Find results like 'car', 'carneval', 'carousell'.
Find a bug in your code using basic debugging principles:
For a more detailed visualization of the whole configuration procedure follow the Breakpoint bisecting Tutorial.