Perhaps you should try some spelling variations:
ggain » gain, again
grain » ggain, grail
rain » gain, rail
raint » gaint, railt, saint, rainy, rains
brain » bgain, brail
geraint » gegaint, gerailt, gesaint, gerainy, gerains
bond » bonds
graw » grow, raw, draw
rice » price, rise, rich
gran » grant, grand, iran
gray » ray

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: ((((((grain OR ggain) OR rain) OR band) OR (had OR land)) OR (bank OR bond)) OR ((((graw OR rawtdtd) OR (trade OR rice)) OR gran) OR ((((gray OR raint) OR brain) OR geraint) OR main))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((grain OR ggain) or rain) or band) or (had or land)) or (bank or bond)) or ((((graw or rawtdtd) or (trade or rice)) or gran) or ((((gray or raint) or brain) or geraint) or main))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((((grain OR ggain) or rain) or band) or (had or land)) or (bank or bond)) or ((((graw or rawtdtd) or (trade or rice)) or gran) or ((((gray or raint) or brain) or geraint) or main))) counterinsurgency study ;*.