Perhaps you should try some spelling variations:
wars science » art science, dairy science, world science
science book » science food, science from
open science » en sciences, new science
science vol » science food, science from
del science » del paciente
book ver » book new

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: "(((( wars science book ver ) OR ( open science vol ver ))) OR ( del science book ver ))~".
• Adding a wildcard symbol may retrieve word variants: (((( wars science book ver ) OR ( open science vol ver ))) OR ( del science book ver ))*.