Perhaps you should try some spelling variations:
sand » stand, san
rank » ranks, bank
frank » franks, fbank
banks » bank
fbank » bank
frans » franz, trans, fran
hand » had, hard
band » bank, bond
irani » iran, iraqi, rani
irand » brand, iran, grand
igrand » grand, igrantd, igraind, igrandd
graind » grained, grain, grains, gmaind, ggaind, graild
grandtd » grantdtd, graindtd, granddtd
gran » grant, grain, grand
rain » main, gain, rail
brain » bmain, bgain, brail

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((((sand or (rank or banks)) or ((fbank OR frank) or frans)) or hand) or land) or band) or ((((grandtd or irani) or (irand or igrand)) or graind) or (gran or (rain or brain)))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((((sand OR (rank OR banks)) OR ((fbank OR frank) OR frans)) OR hand) OR land) OR band) OR ((((grandtd OR irani) OR (irand OR igrand)) OR graind) OR (gran OR (rain OR brain)))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((sand or (rank or banks)) or ((fbank OR frank) or frans)) or hand) or land) or band) or ((((grandtd or irani) or (irand or igrand)) or graind) or (gran or (rain or brain)))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: ((((((sand or (rank or banks)) or ((fbank OR frank) or frans)) or hand) or land) or band) or ((((grandtd or irani) or (irand or igrand)) or graind) or (gran or (rain or brain)))) counterinsurgency study ;*.