Perhaps you should try some spelling variations:
"experimental fields" » "experimental films", "experimental yield", "experimental fires"
"experimental facts" » "experimental aspects", "experimental facilities"
"experimental film" » "experimental films", "experimental facility"

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: (("experimental field") OR ((("experimental facts") OR ((("experimental fields") OR ((("experimental film") OR ("experimental fluid")))))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"experimental field\") or (((\"experimental facts\") or (((\"experimental fields\") or (((\"experimental film\") OR (\"experimental fluid\"))))))))".
• Removing quotes may allow a broader search: (( experimental field ) or ((( experimental facts ) or ((( experimental fields ) or ((( experimental film ) OR ( experimental fluid )))))))).
• Adding a wildcard symbol may retrieve word variants: (("experimental field") or ((("experimental facts") or ((("experimental fields") or ((("experimental film") OR ("experimental fluid"))))))))*.