Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh tai » thanh tai, hang tai, han tai
cham lao » chai lao, cham lai, cham vao
sach ty » sach y, sach tu, sach thu
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, mang may
lao va » tao va, cao va, bao va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty ((nang ma) or (nang cao)) hoi. ((hieu vu) or (hieu qua)) cham lao va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty ((nang ma) OR (nang cao)) hoi. ((hieu vu) OR (hieu qua)) cham lao va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty ((nang ma) or (nang cao)) hoi. ((hieu vu) or (hieu qua)) cham lao va hanh tai cua tre*.