Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
truc va » thuc va, thuc vat, trung va
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
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: ((vu sach) or (so sach)) y nang xa hoi. hieu van cac ((truc va) or (tuc xa)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) y nang xa hoi. hieu van cac ((truc va) OR (tuc xa)) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) y nang xa hoi. hieu van cac ((truc va) or (tuc xa)) hanh vi cua te*.