Perhaps you should try some spelling variations:
rand » brand, sand, rank
grand » gbrand, gsand, grank, brand, irand, grayd, gramd
grandtd » gbrandtd, gsandtd, granktd, brandtd, irandtd, graydtd, gramdtd
band » bank
bond » bonds
graw » grow, raw, draw
granktd » iranktd, grayktd, gramktd
gran » iran, gray, gram
grant » irant, grayt, gramt, grants
tran » train, trans, than
graint » geraint, grains, gradient, braint, raint
grayt » gray, graft
grain » brain, rain

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: ((((rand OR (hand OR hard)) OR (had OR land)) OR (band OR bond)) OR ((((grand OR (grandtd OR granktd)) OR graw) OR (gran OR tran)) OR ((graint OR (grant OR grayt)) OR grain))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or (hand or hard)) or (had or land)) or (band or bond)) or ((((grand or (grandtd OR granktd)) or graw) or (gran or tran)) or ((graint or (grant or grayt)) or grain))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((rand or (hand or hard)) or (had or land)) or (band or bond)) or ((((grand or (grandtd OR granktd)) or graw) or (gran or tran)) or ((graint or (grant or grayt)) or grain))) counterinsurgency study ;*.