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

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 (((\"del pacientes con ever\") OR (\"new science food ever\"))))~".
• Removing quotes may allow a broader search: (( best science book ever ) OR ((( del pacientes con ever ) OR ( new science food ever ))))~.
• Adding a wildcard symbol may retrieve word variants: (("best science book ever") OR ((("del pacientes con ever") OR ("new science food ever"))))*.