Perhaps you should try some spelling variations:
"life sciences book over" » "life sciences hors over"
"best science book over" » "les sciences book over", "new science book over", "art science book over", "best science from over", "best science vol over"
"del science food ver" » "del science from ver", "del science mad ver", "del science mind ver", "del paciente food 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 over\") OR (\"life sciences book over\"))) OR (\"del science food ver\"))~".
• Removing quotes may allow a broader search: (((( best science book over ) OR ( life sciences book over ))) OR ( del science food ver ))~.
• Adding a wildcard symbol may retrieve word variants: (((("best science book over") OR ("life sciences book over"))) OR ("del science food ver"))*.