Perhaps you should try some spelling variations:
rand » brand, grand, band
granddtd » gbranddtd, ggranddtd, gbanddtd
grandts » gbrandts, ggrandts, gbandts, grants, grandes
rani » rank, ani, rai
gbrain » brain, grain, gbbrain, gbgain, gbrail
brail » brazil, brasil, rail
rain » brain, gain, rail

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: ((((rand OR hard) OR (had OR land)) OR (bank OR bonds)) OR (((((gbandddt OR ((ravi OR rani) OR frank)) OR (granddtd OR ((grandts OR gbandts) OR migrants))) OR raw) OR (gbrain OR brail)) OR (main OR rain))) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((rand or hard) or (had or land)) or (bank or bonds)) or (((((gbandddt or ((ravi or rani) or frank)) or (granddtd or ((grandts OR gbandts) or migrants))) or raw) or (gbrain or brail)) or (main or rain))) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((rand or hard) or (had or land)) or (bank or bonds)) or (((((gbandddt or ((ravi or rani) or frank)) or (granddtd or ((grandts OR gbandts) or migrants))) or raw) or (gbrain or brail)) or (main or rain))) counterinsurgency study ;*.