Perhaps you should try some spelling variations:
thien van » thi van
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam truc, nam tu
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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 ty nang ma hoa. ((hieu va) or (thien van)) nam tuc va hang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoa. ((hieu va) OR (thien van)) nam tuc va hang di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoa. ((hieu va) or (thien van)) nam tuc va hang di cua tre*.