Perhaps you should try some spelling variations:
rank » ranks, frank, bank
band » bank
hand » hard
grand » brand, graind, irand, grawd
grandtd » brandtd, graindtd, irandtd, grawdtd
draw » draws, raw
rawe » grawe, rate, raw
gran » grain, iran, graw
grant » graint, irant, grawt, grants
braint » brain, brains, brant
gain » gains, main
again » agains, amain

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((((rank or band) or hand) or (had or land)) or (bond or bonds)) or ((((grand or grandtd) or (draw or rawe)) or ((gran OR grant) or draw)) or ((braint or gain) or again))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((rank OR band) OR hand) OR (had OR land)) OR (bond OR bonds)) OR ((((grand OR grandtd) OR (draw OR rawe)) OR ((gran OR grant) OR draw)) OR ((braint OR gain) OR again))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((rank or band) or hand) or (had or land)) or (bond or bonds)) or ((((grand or grandtd) or (draw or rawe)) or ((gran OR grant) or draw)) or ((braint or gain) or again))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((rank or band) or hand) or (had or land)) or (bond or bonds)) or ((((grand or grandtd) or (draw or rawe)) or ((gran OR grant) or draw)) or ((braint or gain) or again))) counterinsurgency study ;*.