Perhaps you should try some spelling variations:
class history » crises history
paris history » prices history, banks history
sports wheat » sports great, sports event, sports team
storms great » stories great, sports great, torts great
wheat paris » wheat prices
great class » great crisis
des sports » areas sports
dust » must, just

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( des sports wheat paris history ) or ( dust storms great class history ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( des sports wheat paris history ) OR ( dust storms great class history )).
• Adding a wildcard symbol may retrieve word variants: (( des sports wheat paris history ) or ( dust storms great class history ))*.