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: ((((sand OR san) OR (hand OR land)) OR (band OR bond)) OR (((grand OR (grayd OR (gray OR graw))) OR ((tran OR (grain OR brain)) OR (frank OR ffranks))) OR grant)) counterinsurgency study ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((sand or san) or (hand or land)) or (band or bond)) or (((grand or (grayd or (gray OR graw))) or ((tran or (grain or brain)) or (frank or ffranks))) or grant)) counterinsurgency study ;~".
• Adding a wildcard symbol may retrieve word variants: ((((sand or san) or (hand or land)) or (band or bond)) or (((grand or (grayd or (gray OR graw))) or ((tran or (grain or brain)) or (frank or ffranks))) or grant)) counterinsurgency study ;*.