Perhaps you should try some spelling variations:
strained » trained, strain, attained
irand » brand, iran, rand
grand » brand, graind, irand, grayd
grande » brande, grainde, irande, grayde, grandle, grange, grand
graw » grow, raw, draw
gran » grain, iran, gray
grant » graint, irant, grayt, grants
rande » randle, range, rand
grade » trade

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 gran) or (grant or (graindt or (rande or (grande OR grade)))))) 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 gran) OR (grant OR (graindt OR (rande OR (grande OR grade)))))) 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 gran) or (grant or (graindt or (rande or (grande OR grade)))))) 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 gran) or (grant or (graindt or (rande or (grande OR grade)))))) counterinsurgency study ;*.