Perhaps you should try some spelling variations:
rank » ranks, frank
graind » grained, grains, grand, gmaind, ggaind, graild
hand » hard
sand » stand, san
band » bond
tgained » gained, trained, attained
drawe » draws, drawn, drake, drawse, rawe
draw » draws, raw
braint » brains, brant, bsaint, brainy, bmaint, bgaint, brailt
raint » saint, rainy, rains, maint, gaint, railt
grain » gmain, ggain, grail
rain » main, gain, rail
brain » bmain, bgain, brail

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 graind) or hand) or (had or land)) or (bank or bonds)) or ((((((sand OR band) or tgained) or grandtd) or drawe) or (grain or draw)) or ((braint or raint) or (rain or brain)))) counterinsurgency study ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((rank OR graind) OR hand) OR (had OR land)) OR (bank OR bonds)) OR ((((((sand OR band) OR tgained) OR grandtd) OR drawe) OR (grain OR draw)) OR ((braint OR raint) OR (rain OR brain)))) counterinsurgency study ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((rank or graind) or hand) or (had or land)) or (bank or bonds)) or ((((((sand OR band) or tgained) or grandtd) or drawe) or (grain or draw)) or ((braint or raint) or (rain or brain)))) counterinsurgency study ;".
• Adding a wildcard symbol may retrieve word variants: (((((rank or graind) or hand) or (had or land)) or (bank or bonds)) or ((((((sand OR band) or tgained) or grandtd) or drawe) or (grain or draw)) or ((braint or raint) or (rain or brain)))) counterinsurgency study ;*.