Perhaps you should try some spelling variations:
"best science book ever" » "les sciences book ever", "new science book ever", "art science book ever", "best science from ever", "best science vol ever"
"best science food ever" » "les sciences food ever", "new science food ever", "art science food ever", "best science from ever", "best science mad ever", "best science mind ever"
"del science book ever" » "del science from ever", "del science vol ever", "del paciente book ever"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("best science book ever") OR ("del science book ever"))) OR ("best science food ever"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"best science book ever\") OR (\"del science book ever\"))) OR (\"best science food ever\"))".
• Removing quotes may allow a broader search: (((( best science book ever ) OR ( del science book ever ))) OR ( best science food ever )).
• Adding a wildcard symbol may retrieve word variants: (((("best science book ever") OR ("del science book ever"))) OR ("best science food ever"))*.