Perhaps you should try some spelling variations:
rand » brand, hand, sand
grand » gbrand, ghand, gsand, grant, brand, grantd, irand, trand
trand » tbrand, thand, tsand, strand, trend, brand
rank » ranks, frank
grace » grade, race
gran » grant, iran, tran
gray » ray
graw » grow, raw, draw
bgain » gain, brain, again
rain » brain, main, gain
grain » gbrain, gmain, ggain, brain

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 (band OR bank)) OR (had OR land)) OR (bond OR bonds)) OR (((((rank OR (grand OR trand)) OR gbandtd) OR grace) OR ((gran OR gray) OR graw)) OR ((bgain OR rain) OR grain))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or (band or bank)) or (had or land)) or (bond or bonds)) or (((((rank or (grand OR trand)) or gbandtd) or grace) or ((gran or gray) or graw)) or ((bgain or rain) or grain))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((rand or (band or bank)) or (had or land)) or (bond or bonds)) or (((((rank or (grand OR trand)) or gbandtd) or grace) or ((gran or gray) or graw)) or ((bgain or rain) or grain))) counterinsurgency study ;*.