Perhaps you should try some spelling variations:
rand » brand, band, sand
grand » gbrand, gband, gsand, brand, graind, irand, grawd
rank » ranks
frank » franks
franks » frankss, ranks, frans
hand » had, band, hard
grant » grants, graint, irant, grawt
graint » geraint, grain, grains
trained » trainfed, tgrained, tdrained
rained » rainfed, grained, drained
gran » grain, iran, graw

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 grand) OR stand) OR rank) OR (frank OR franks)) OR hand) OR land) OR bank) OR ((((grant OR graint) OR igsand) OR (trained OR rained)) OR (gran OR brain))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((rand OR grand) or stand) or rank) or (frank or franks)) or hand) or land) or bank) or ((((grant or graint) or igsand) or (trained or rained)) or (gran or brain))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((((((rand OR grand) or stand) or rank) or (frank or franks)) or hand) or land) or bank) or ((((grant or graint) or igsand) or (trained or rained)) or (gran or brain))) counterinsurgency study ;*.