Perhaps you should try some spelling variations:
rand » brand, grand, hand
grained » gained, trained, strained, ggained, grailed
rank » ranks, frank, bank
banks » bank
band » bank, bond
irans » iran, trans, frans
gran » grant, grain, grand
rain » gain, rail
brain » bgain, brail

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 (((gmaintdttd or gmaintdttd) or grained) or grained)) or had) or (rank or banks)) or stand) or land) or band) or (irans or (gran or ((rain OR brain) or main)))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((((rand OR (((gmaintdttd OR gmaintdttd) OR grained) OR grained)) OR had) OR (rank OR banks)) OR stand) OR land) OR band) OR (irans OR (gran OR ((rain OR brain) OR main)))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((((rand or (((gmaintdttd or gmaintdttd) or grained) or grained)) or had) or (rank or banks)) or stand) or land) or band) or (irans or (gran or ((rain OR brain) or main)))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((((rand or (((gmaintdttd or gmaintdttd) or grained) or grained)) or had) or (rank or banks)) or stand) or land) or band) or (irans or (gran or ((rain OR brain) or main)))) counterinsurgency study ;*.