Perhaps you should try some spelling variations:
rank » ranks, bank
frank » franks, fbank
irant » iran, brant, trant
irand » brand, iran, rand
irani » iran, iraqi, rani
grawd » graw, grad, grawe
grand » brand, irand, grawd, grayd
graft » draft, craft, kraft
grant » grants, irant, grawt, grayt
band » bank, bond
irans » iran, trans, frans
gran » iran, graw, gray
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 grant)) or (irand or irani))) or had) or frank) or san) or land) or band) 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 grant)) OR (irand OR irani))) OR had) OR frank) OR san) OR land) OR band) 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 grant)) or (irand or irani))) or had) or frank) or san) or land) or band) 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 grant)) or (irand or irani))) or had) or frank) or san) or land) or band) or (irans or (gran or grain))) counterinsurgency study ;*.