Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
sach ty » sach y, sach tu, xach tay
nang ma » tang ma, sang ma, nang cao
ca tren » cau tren, cu tren, la tren
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
xuc va » tuc va, luc va, xac va
vi ca » vit ca, li ca, va ca

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: te ((sach ty) OR (sach thu)) nang ma hoi. lieu va cam ((xuc va) OR (duc va)) hanh vi ca tren~.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) nang ma hoi. lieu va cam ((xuc va) or (duc va)) hanh vi ca tren*.