Perhaps you should try some spelling variations:
"food science text search" » "food science texts search", "food science team search", "food science context search"
"food science ten searches" » "food science gene searches", "food science knn searches", "food science lep searches", "food science thin searches", "food science team searches", "food science two searches"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("food science text search") OR ("food science ten searches")).
• Removing quotes may allow a broader search: (( food science text search ) or ( food science ten searches )).
• Adding a wildcard symbol may retrieve word variants: (("food science text search") or ("food science ten searches"))*.