Perhaps you should try some spelling variations:
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
cua tre » cuu tre, cua triet, dua tren
sach vu » sach va, sach tu, sach uu
dan vi » doan vi, don vi, dan va
cua te » cua tu
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va

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 vu nang xa hoi. hieu va chat ((xuc va) or (tuc va)) dan vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang xa hoi. hieu va chat ((xuc va) OR (tuc va)) dan vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach vu nang xa hoi. hieu va chat ((xuc va) or (tuc va)) dan vi ((cua tre) or (cua te))*.