Perhaps you should try some spelling variations:
rand » brand, sand, rank
grand » gbrand, gsand, grank, brand
band » bank
grayd » grad, rayd
grant » grants
grain » brain, rain
graw » raw, draw, grew
grayttd » rayttd
gray » ray
trains » grains

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 hand) or hard) or (had or land)) or (band or (bond OR bonds))) or ((((((grayd or grant) or grain) or grayttd) or (grow or graw)) or (grand or gray)) or trains)) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((rand OR hand) OR hard) OR (had OR land)) OR (band OR (bond OR bonds))) OR ((((((grayd OR grant) OR grain) OR grayttd) OR (grow OR graw)) OR (grand OR gray)) OR trains)) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((rand or hand) or hard) or (had or land)) or (band or (bond OR bonds))) or ((((((grayd or grant) or grain) or grayttd) or (grow or graw)) or (grand or gray)) or trains)) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((rand or hand) or hard) or (had or land)) or (band or (bond OR bonds))) or ((((((grayd or grant) or grain) or grayttd) or (grow or graw)) or (grand or gray)) or trains)) counterinsurgency study ;*.