Perhaps you should try some spelling variations:
rand » brand
grand » gbrand, grantd, irand, grawd, grant, brand
rank » ranks
frank » franks
granks » grankss, ranks, grants, grantks, iranks, grawks
sand » stand, san
hand » hard
band » bond
graind » grained, grains, braind, gbraind, gmaind, ggaind
grain » brain, gbrain, gmain, ggain
rain » brain, main, gain
gran » grant, iran, graw
ghad » ghada, chad, grad

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