Perhaps you should try some spelling variations:
rand » brand, hand, sand
grand » gbrand, ghand, gsand, brand
grade » trade
grant » grants
graw » grow, raw, draw
bgain » brain, again, bain, bgains, bmain
gain » gains, main
rain » brain, main, rail
grain » gbrain, gmain, grail, 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 (((((frank OR grand) OR gbandtd) OR grade) OR (grant OR graw)) OR (((bgain OR gain) 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 (((((frank or grand) or gbandtd) or grade) or (grant or graw)) or (((bgain OR gain) 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 (((((frank or grand) or gbandtd) or grade) or (grant or graw)) or (((bgain OR gain) or rain) or grain))) counterinsurgency study ;*.