Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
te sach » toc sach
uu nang » cuu nang, vu nang, cuu nong
nang xa » nang x, lang xa, nang ma
sach uu » sach luu, sach tu, sach xu
cua tre » cuu tre, cua triet, dua tren
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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