Perhaps you should try some spelling variations:
rank » ranks, frank, bank
grank » granks, gfrank, gbank, frank, graink, grawk, grayk
ffranks » ffrankss, fffranks, ffbanks
fffranks » fffrankss, ffffranks, fffbanks
sand » stand, san
hand » hard
band » bank, bond
grantk » grants, grantsk, graintk, grawtk, graytk
grant » grants, graint, grawt, grayt
irant » irani, brant, irans
gran » grain, graw, gray
grandt » graindt, grawdt, graydt, grande, brandt
grand » graind, grawd, grayd, 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 (grant or (irant or (iran OR iron))))) 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 (grant OR (irant OR (iran OR iron))))) 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 (grant or (irant or (iran OR iron))))) 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 (grant or (irant or (iran OR iron))))) or gran) or (ffranks or fffranks)) or (grandt or grand)) or ghana)) counterinsurgency study ;*.