Perhaps you should try some spelling variations:
sand » stand, hand
bond » bonds
grand » brand, irand, grawd, grayd
grandtd » brandtd, irandtd, grawdtd, graydtd
grayd » gray, grad
grawe » grade, grace, graw
gran » iran, graw, gray
grant » irant, grawt, grayt, grants
gmain » main, smain
gain » main
gains » mains
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: (((((sand or san) or hard) or (had or land)) or ((band or bank) or bond)) or (((((grand OR grayd) or grandtd) or grawe) or ((gran or grant) or (gmain or (gain or gains)))) or grain)) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((sand OR san) OR hard) OR (had OR land)) OR ((band OR bank) OR bond)) OR (((((grand OR grayd) OR grandtd) OR grawe) OR ((gran OR grant) OR (gmain OR (gain OR gains)))) OR grain)) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((sand or san) or hard) or (had or land)) or ((band or bank) or bond)) or (((((grand OR grayd) or grandtd) or grawe) or ((gran or grant) or (gmain or (gain or gains)))) or grain)) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((sand or san) or hard) or (had or land)) or ((band or bank) or bond)) or (((((grand OR grayd) or grandtd) or grawe) or ((gran or grant) or (gmain or (gain or gains)))) or grain)) counterinsurgency study ;*.