Perhaps you should try some spelling variations:
rank » ranks, frank, bank
grank » granks, gfrank, gbank, grant, frank, grantk, graink, irank
ffranks » ffrankss, fffranks, ffbanks
fffranks » fffrankss, ffffranks, fffbanks
sand » stand, san
hand » hard
band » bank, bond
grantk » grants, grant, granttk, graintk, irantk
graint » geraint, grant, grain
irant » grant, iran, irani
grawt » grant, graw, grawe
graft » grant, draft, craft
gran » grant, grain, iran
grandt » grantdt, graindt, irandt, grant, grande, brandt, grantt
grand » grantd, graind, irand, grant, brand

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