Perhaps you should try some spelling variations:
rand » brand, grand, hand
grandk » gbrandk, ggrandk, ghandk, grand, grande, grantdk, granddk, irandk
rank » frank
ranks » franks, banks
grank » gfrank, grant, frank, grand, grantk, grandk, irank
band » bond
graind » grains, grand, braind, raind
grained » gained, trained, strained, brained, rained
granttd » grantttd, grandttd, iranttd
granted » grantted, grandted, iranted
migrants » migrantts, migrandts, miirants
gran » grant, grand, iran
grain » brain, rain

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 ranks)) or san) or ((band or bank) or land)) or (((granttd or granted) or migrants) or ((grank or ((grandk OR ghandk) or ((graind or grained) or (graind or grained)))) or (gran or grain)))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((rand OR (rank OR ranks)) OR san) OR ((band OR bank) OR land)) OR (((granttd OR granted) OR migrants) OR ((grank OR ((grandk OR ghandk) OR ((graind OR grained) OR (graind OR grained)))) OR (gran OR grain)))) counterinsurgency study ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or (rank or ranks)) or san) or ((band or bank) or land)) or (((granttd or granted) or migrants) or ((grank or ((grandk OR ghandk) or ((graind or grained) or (graind or grained)))) or (gran or grain)))) counterinsurgency study ;*".