Perhaps you should try some spelling variations:
tnf history » imf history, ref history, motif history
etf history » reef history, imf history, ref history
2f germany » 2 germany, 20 germany, 21 germany
90 20th » 20 20th, 1990 20th
94 20th » 4 20th, 94 24th, 1994 20th

Try widening your search to All Fields.

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: %22agriculture AND state %2f germany %((tnf history) OR (etf history)) %((90 20th) OR (94 20th)) century%22.
• Adding a wildcard symbol may retrieve word variants: %22agriculture and state %2f germany %((tnf history) or (etf history)) %((90 20th) or (94 20th)) century%22*.