Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam truc, nam tu
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
va nam » van nam, ha nam, va nay
tuc va » thuc va, truc va, tuc xa
vi cuu » vi luu, vinh cuu

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) or (mang may)) hoi. hieu va nam tuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (mang may)) hoi. hieu va nam tuc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (mang may)) hoi. hieu va nam tuc va hanh vi cuu tre*.