Perhaps you should try some spelling variations:
studies force » studies formal, studies from, studies food
force surveys » force survey, firm surveys
harvard blood » harvard cold
harvard bond » harvard cold, harvard home
sale studies » scale studies, sage studies, state studies
blood case » good case, blocs case, blood gas
bond sale » bond sales, bond rate

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( harvard bond sale studies force surveys. ) or ( harvard blood case studies force surveys. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( harvard bond sale studies force surveys. ) OR ( harvard blood case studies force surveys. )).
• Adding a wildcard symbol may retrieve word variants: (( harvard bond sale studies force surveys. ) or ( harvard blood case studies force surveys. ))*.