Perhaps you should try some spelling variations:
rank » ranks, frank
graind » grained, grain, grains, gbraind, gmaind, ggaind
hand » band
tgained » gained, trained, attained
drawn » draws, drawsn, rawn
grandtd » grantdtd, graindtd, granddtd
gran » grant, grain, grand
draw » draws, raw
brant » brandt, grant, brand
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 graind) or (hand OR hard)) or (had or land)) or (bank or bonds)) or (((((san or tgained) or grandtd) or drawn) or (gran 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 graind) OR (hand OR hard)) OR (had OR land)) OR (bank OR bonds)) OR (((((san OR tgained) OR grandtd) OR drawn) OR (gran 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 graind) or (hand OR hard)) or (had or land)) or (bank or bonds)) or (((((san or tgained) or grandtd) or drawn) or (gran or draw)) or ((brant or saint) or rain))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((rank or graind) or (hand OR hard)) or (had or land)) or (bank or bonds)) or (((((san or tgained) or grandtd) or drawn) or (gran or draw)) or ((brant or saint) or rain))) counterinsurgency study ;*.