Perhaps you should try some spelling variations:
rand » brand, grand, hand
grandk » gbrandk, ggrandk, ghandk, grand, grande
rank » frank
ranks » franks, banks
gfrank » gffrank, frank
sand » stand, san, hand
band » bond
grants » migrants
graints » gradients, braints, raints
graintd » braintd, raintd
grains » brains, rains
grain » brain, rain
graind » braind, raind, grand
grained » brained, rained, gained, strained

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 sand) OR ((band OR bank) OR land)) OR ((graintd OR (grants OR (graints OR grains))) OR ((gfrank OR grandk) OR (grain OR (graind OR (grained OR trained)))))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or (rank or ranks)) or sand) or ((band or bank) or land)) or ((graintd or (grants or (graints OR grains))) or ((gfrank or grandk) or (grain or (graind or (grained or trained)))))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((rand or (rank or ranks)) or sand) or ((band or bank) or land)) or ((graintd or (grants or (graints OR grains))) or ((gfrank or grandk) or (grain or (graind or (grained or trained)))))) counterinsurgency study ;*.