Perhaps you should try some spelling variations:
rand » brand, grand, rank
band » bank, bond
sand » stand, san
grants » migrants
grawe » grade, grace, graw
brains » brain, grains, trains, bbrains, bmains, bgains
bgains » gains, bargains
rain » brain, main, gain
bmain » main, brain, bain

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 hard) or (had or land)) or (band or bonds)) or ((((((sand OR hand) or grants) or granted) or grawe) or (grant or grow)) or (((brains or bgains) or rain) or bmain))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((rand OR hard) OR (had OR land)) OR (band OR bonds)) OR ((((((sand OR hand) OR grants) OR granted) OR grawe) OR (grant OR grow)) OR (((brains OR bgains) OR rain) OR bmain))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or hard) or (had or land)) or (band or bonds)) or ((((((sand OR hand) or grants) or granted) or grawe) or (grant or grow)) or (((brains or bgains) or rain) or bmain))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: ((((rand or hard) or (had or land)) or (band or bonds)) or ((((((sand OR hand) or grants) or granted) or grawe) or (grant or grow)) or (((brains or bgains) or rain) or bmain))) counterinsurgency study ;*.