Perhaps you should try some spelling variations:
rand » brand, band, hand
grand » gbrand, gband, ghand, brand, irand, grawd, trand
rank » frank
ranks » franks, banks
grantd » granted, grants, grantsd, irantd, grawtd, trantd
grant » grants, irant, grawt, trant
grawd » graw, grad, grawe
gran » iran, graw, tran
gray » ray, graw
graint » geraint, grains, gradient, braint, raint
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 (rank OR ranks)) OR bank) OR (had OR land)) OR (bond OR bonds)) OR (((((grantd OR (grand OR grant)) OR grawktd) OR (grawd OR raw)) OR (gran OR gray)) OR (graint OR grain))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((rand or (rank OR ranks)) or bank) or (had or land)) or (bond or bonds)) or (((((grantd or (grand or grant)) or grawktd) or (grawd or raw)) or (gran or gray)) or (graint or grain))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: (((((rand or (rank OR ranks)) or bank) or (had or land)) or (bond or bonds)) or (((((grantd or (grand or grant)) or grawktd) or (grawd or raw)) or (gran or gray)) or (graint or grain))) counterinsurgency study ;*.