Perhaps you should try some spelling variations:
"last revolution series" » "last revolution serielles", "last revolution sources", "last revolution studies", "post revolution series", "next revolution series", "silent revolution series"
"states resolution source" » "states revolution source", "states evolution source", "stars resolution source", "states resolution space", "states resolution some", "states resolution search"

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: "((\"last revolution series\") OR (\"states resolution source\"))".
• Removing quotes may allow a broader search: (( last revolution series ) OR ( states resolution source )).
• Adding a wildcard symbol may retrieve word variants: (("last revolution series") OR ("states resolution source"))*.