Perhaps you should try some spelling variations:
sand » stand, san, hand
grand » brand
harm » farm, hard, hardm, hairm, hartm
heat » head
hardo » hard, pardo, haro, harddo, hairdo, hartdo
hardy » hardly, hard, harry, harddy, hairdy, hartdy
ghardtt » gharddtt, ghairdtt, ghartdtt
har » hard, hair, hart
hardtd » harddtd, hairdtd, hartdtd
bharti » bhardti, bhairti, bhartti
grant » grants

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: ((((bonds OR (air OR had)) OR (sand OR (((band OR bond) OR bank) OR grand))) OR land) OR ((((ghardtt OR harm) OR heat) OR ((((hardo OR hardy) OR har) OR ((hardtd OR heart) OR bharti)) OR hairidm)) OR grant)) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((bonds or (air or had)) or (sand or (((band OR bond) or bank) or grand))) or land) or ((((ghardtt or harm) or heat) or ((((hardo or hardy) or har) or ((hardtd or heart) or bharti)) or hairidm)) or grant)) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((bonds or (air or had)) or (sand or (((band OR bond) or bank) or grand))) or land) or ((((ghardtt or harm) or heat) or ((((hardo or hardy) or har) or ((hardtd or heart) or bharti)) or hairidm)) or grant)) counterinsurgency study ;*.