Perhaps you should try some spelling variations:
strained » trained, strain, attained
irand » brand, iran, rand
irande » brande, irane, rande, grande
grand » brand, graind, irand, trand
graw » raw, draw, grew
gran » grain, iran, tran
grant » graint, irant, trant, grants
gray » ray

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((san or hard) or (had or land)) or (bank or bonds)) or (((((strained or (irand or grand)) or irantd) or (graw or grow)) or (gran OR gray)) or (grant or (graindt or irande)))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((san OR hard) OR (had OR land)) OR (bank OR bonds)) OR (((((strained OR (irand OR grand)) OR irantd) OR (graw OR grow)) OR (gran OR gray)) OR (grant OR (graindt OR irande)))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((san or hard) or (had or land)) or (bank or bonds)) or (((((strained or (irand or grand)) or irantd) or (graw or grow)) or (gran OR gray)) or (grant or (graindt or irande)))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: ((((san or hard) or (had or land)) or (bank or bonds)) or (((((strained or (irand or grand)) or irantd) or (graw or grow)) or (gran OR gray)) or (grant or (graindt or irande)))) counterinsurgency study ;*.