Perhaps you should try some spelling variations:
xa khanh » xa thanh, van khanh, dat khanh
te sach » toc sach
nam tuc » nam thuc, nam truc, nam tu
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, va hanh, da hanh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. ((hieu va) or (hieu qua)) nam tuc ((xa hanh) or (xa khanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. ((hieu va) OR (hieu qua)) nam tuc ((xa hanh) OR (xa khanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. ((hieu va) or (hieu qua)) nam tuc ((xa hanh) or (xa khanh)) vai cua tre*.