Perhaps you should try some spelling variations:
ranks » banks
grant » grants, grandt, irant, grawt
grantdtd » grantsdtd, granted, grandtdtd, irantdtd, grawtdtd
grawt » graw, graft, grawe
race » rate, face, rice
gran » grand, iran, graw
raint » saint, rains, paint, maint, gaint, railt
grain » gmain, ggain, grail
brain » bmain, bgain, brail
rain » main, gain, rail
rainy » mainy, gainy, raily

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((hard or ranks) or band) or (had or land)) or (bank or (bond or bonds))) or ((((((grant or grawt) or (grain or brain)) or grantdtd) or race) or gran) or ((raint OR rain) or rainy))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((hard OR ranks) OR band) OR (had OR land)) OR (bank OR (bond OR bonds))) OR ((((((grant OR grawt) OR (grain OR brain)) OR grantdtd) OR race) OR gran) OR ((raint OR rain) OR rainy))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((hard or ranks) or band) or (had or land)) or (bank or (bond or bonds))) or ((((((grant or grawt) or (grain or brain)) or grantdtd) or race) or gran) or ((raint OR rain) or rainy))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((hard or ranks) or band) or (had or land)) or (bank or (bond or bonds))) or ((((((grant or grawt) or (grain or brain)) or grantdtd) or race) or gran) or ((raint OR rain) or rainy))) counterinsurgency study ;*.