Perhaps you should try some spelling variations:
rank » ranks, frank
frans » frank, franz, trans
rain » brain, main, gain
grain » gbrain, gmain, ggain, brain
grains » gbrains, gmains, ggains, brains
gstand » stand
rstand » stand
grad » grade, grand, grid
grant » grants

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((((((band OR bond) OR (rank OR bank)) OR (frans OR frans)) OR had) OR land) OR bonds) OR ((rain OR (((gstand OR rstand) OR grad) OR san)) OR ((grain OR grant) OR (ggainddts OR grains)))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((((band OR bond) or (rank or bank)) or (frans or frans)) or had) or land) or bonds) or ((rain or (((gstand or rstand) or grad) or san)) or ((grain or grant) or (ggainddts or grains)))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: (((((((band OR bond) or (rank or bank)) or (frans or frans)) or had) or land) or bonds) or ((rain or (((gstand or rstand) or grad) or san)) or ((grain or grant) or (ggainddts or grains)))) counterinsurgency study ;*.