Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
cau tren » cu tren, dau tren, ca tren
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
vai cau » va cau, van cau, vai cac
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va

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: thu sach ((ky sang) OR (ky tang)) mai hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vai cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky sang) or (ky tang)) mai hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vai cau tren~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) or (ky tang)) mai hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vai cau tren*.