Perhaps you should try some spelling variations:
hanh gian » thanh gian, thanh giang, manh giang
gian cua » gian xu, ban cua
sach ty » sach tu, sach thu, xach tay
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va bao » va bai
bao do » ban do, dao do, cao do
do va » do van, so 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: su ((sach y) OR (sach ty)) nang ma hoi. hieu va bao do va hanh gian cua tre~.
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sach ty)) nang ma hoi. hieu va bao do va hanh gian cua tre*.