Perhaps you should try some spelling variations:
rank » ranks
frank » franks
irant » grant, iran, brant
irand » brand, iran, rand
irani » iran, iraqi, rani
grawd » graw, grad, grawe
grand » grant, brand, grantd, irand, grawd
graft » grant, draft, craft
irans » iran, trans, frans
gran » grant, iran, graw
grain » brain, rain

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 ((((irant or (irand or irani)) or (grawd OR grand)) or graft) or (irand or irani))) or had) or frank) or san) or land) or bank) or (irans or (gran or grain))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((((rank OR ((((irant OR (irand OR irani)) OR (grawd OR grand)) OR graft) OR (irand OR irani))) OR had) OR frank) OR san) OR land) OR bank) OR (irans OR (gran OR grain))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((((rank or ((((irant or (irand or irani)) or (grawd OR grand)) or graft) or (irand or irani))) or had) or frank) or san) or land) or bank) or (irans or (gran or grain))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((((rank or ((((irant or (irand or irani)) or (grawd OR grand)) or graft) or (irand or irani))) or had) or frank) or san) or land) or bank) or (irans or (gran or grain))) counterinsurgency study ;*.