Perhaps you should try some spelling variations:
"en sciences book over" » "en science book over", "en science food over", "en sciences hors over", "les sciences book over", "_ sciences book over", "en sciences book ver"
"open science a ever" » "new science a ever", "open science _ ever", "open science a never", "open science man ever"
"del science vol ever" » "del paciente vol ever", "del science book ever", "del science food ever", "del science from 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: "((((\"open science a ever\") OR (\"del science vol ever\"))) OR (\"en sciences book over\"))~".
• Removing quotes may allow a broader search: (((( open science a ever ) OR ( del science vol ever ))) OR ( en sciences book over ))~.
• Adding a wildcard symbol may retrieve word variants: (((("open science a ever") OR ("del science vol ever"))) OR ("en sciences book over"))*.