Perhaps you should try some spelling variations:
rank » ranks, frank, bank
grank » granks, gfrank, gbank, grant, frank, grand, grantk, graink, grandk
ffranks » ffrankss, fffranks, ffbanks
fffranks » fffrankss, ffffranks, fffbanks
sand » stand, san
band » bank, bond
grantk » grants, grant, granttk, graintk, grandtk
graint » geraint, grant, grain
irant » grant, iran, irani
grawt » grant, graft, grawe, growt, rawt, drawt
graw » grow, raw, draw
gran » grant, grain, grand
grandt » grantdt, graindt, granddt, grant, grand, grande
graind » grained, grain, grains

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((rank or (sand or ((hand OR hard) or had))) or (band or land)) or (((((grank or (grantk or (graint or (irant or (grawt or graw))))) or gran) or (ffranks or fffranks)) or (grandt or graind)) or ghana)) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((rank OR (sand OR ((hand OR hard) OR had))) OR (band OR land)) OR (((((grank OR (grantk OR (graint OR (irant OR (grawt OR graw))))) OR gran) OR (ffranks OR fffranks)) OR (grandt OR graind)) OR ghana)) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((rank or (sand or ((hand OR hard) or had))) or (band or land)) or (((((grank or (grantk or (graint or (irant or (grawt or graw))))) or gran) or (ffranks or fffranks)) or (grandt or graind)) or ghana)) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((rank or (sand or ((hand OR hard) or had))) or (band or land)) or (((((grank or (grantk or (graint or (irant or (grawt or graw))))) or gran) or (ffranks or fffranks)) or (grandt or graind)) or ghana)) counterinsurgency study ;*.