Perhaps you should try some spelling variations:
"del paciente food over" » "del paciente con over", "del science food over", "del presente food over", "del ambiente food over"
"best science book over" » "del science book over", "les sciences book over", "new science book over", "best science food over", "best science vol over"
"open science from ver" » "del science from ver", "en sciences from ver", "new science from ver", "open science food ver", "open science vol ver", "open science from her", "open science from here", "open science from le"

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