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 over" » "del science from over", "del science vol over", "del paciente book over", "del science book ver"

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

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