Perhaps you should try some spelling variations:
rank » ranks, frank
hand » band, hard
tgained » gained, trained, attained
drawn » draws, drawsn, rawn
grandtd » grantdtd, granddtd, irandtd
gran » grant, grand, iran
grain » brain, gbrain, gmain, ggain
draw » draws, raw
brant » brandt, grant, brand
gbraind » gbbraind, gbmaind, gbgaind
rain » brain, main, gain

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 gbraind) or hand) or (had or land)) or (bank or bonds)) or (((((san or tgained) or grandtd) or drawn) or ((gran OR grain) or draw)) or ((brant or saint) or rain))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((rank OR gbraind) OR hand) OR (had OR land)) OR (bank OR bonds)) OR (((((san OR tgained) OR grandtd) OR drawn) OR ((gran OR grain) OR draw)) OR ((brant OR saint) OR rain))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((rank or gbraind) or hand) or (had or land)) or (bank or bonds)) or (((((san or tgained) or grandtd) or drawn) or ((gran OR grain) or draw)) or ((brant or saint) or rain))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((rank or gbraind) or hand) or (had or land)) or (bank or bonds)) or (((((san or tgained) or grandtd) or drawn) or ((gran OR grain) or draw)) or ((brant or saint) or rain))) counterinsurgency study ;*.