Perhaps you should try some spelling variations:
rand » brand
grand » gbrand, grant, brand
rank » frank
granks » gfranks, grants, gbanks
ranks » franks, banks
sand » stand, san
hand » hard
band » bond
graind » grained, grains, braind, gbraind, gmaind, ggaind
grain » brain, gbrain, gmain, ggain
gbrain » brain, gbbrain, gbmain, gbgain
rain » brain, main, gain
graw » grow, raw, draw

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((rand or rank) or (sand or hand)) or ((band or bank) or land)) or (((graind or ((grain OR gbrain) or rain)) or ((granks or ranks) or (graw or grand))) or ((had or cham) or ghana))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((rand OR rank) OR (sand OR hand)) OR ((band OR bank) OR land)) OR (((graind OR ((grain OR gbrain) OR rain)) OR ((granks OR ranks) OR (graw OR grand))) OR ((had OR cham) OR ghana))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or rank) or (sand or hand)) or ((band or bank) or land)) or (((graind or ((grain OR gbrain) or rain)) or ((granks or ranks) or (graw or grand))) or ((had or cham) or ghana))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: ((((rand or rank) or (sand or hand)) or ((band or bank) or land)) or (((graind or ((grain OR gbrain) or rain)) or ((granks or ranks) or (graw or grand))) or ((had or cham) or ghana))) counterinsurgency study ;*.