Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac truc » cau truc, cac tru, cac trung
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
phat » phan, pham, phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang xa hoi. hieu van cac truc va phat vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. hieu van cac truc va phat vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. hieu van cac truc va phat vi ((cua tre) or (cuu tre))*.