Perhaps you should try some spelling variations:
formal surveys » firm surveys, force surveys, social surveys
studies formal » studies thermal, studies female, studies german
studies rom » studies from, studies rome, studies role
war studies » war stories, early studies
rom series » forum series
cold war » world war
worst » worse

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( harvard worst case studies rom series. ) OR ( harvard cold war studies formal surveys. ))~.
• Adding a wildcard symbol may retrieve word variants: (( harvard worst case studies rom series. ) or ( harvard cold war studies formal surveys. ))*.