Perhaps you should try some spelling variations:
rank » ranks, frank
irand » brand, iran, grand
sand » stand, band, san
tgained » gained, attained, strained
granttd » granted, grantttd, grainttd, grandttd
drawe » draws, drawn, drake, drawse, rawe
gran » grant, grain, grand
draw » draws, raw
rail » mail
braint » brain, brains, brant, bbraint, bmaint, bgaint
trained » tbrained, tmained, tgained
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 irand) or hard) or (had or land)) or (bank or bonds)) or (((((sand or (trained OR tgained)) or granttd) or drawe) or (gran or draw)) or ((rail or braint) or rain))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((rank OR irand) OR hard) OR (had OR land)) OR (bank OR bonds)) OR (((((sand OR (trained OR tgained)) OR granttd) OR drawe) OR (gran OR draw)) OR ((rail OR braint) OR rain))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((rank or irand) or hard) or (had or land)) or (bank or bonds)) or (((((sand or (trained OR tgained)) or granttd) or drawe) or (gran or draw)) or ((rail or braint) or rain))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((rank or irand) or hard) or (had or land)) or (bank or bonds)) or (((((sand or (trained OR tgained)) or granttd) or drawe) or (gran or draw)) or ((rail or braint) or rain))) counterinsurgency study ;*.