Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
xuc va » duc va, tuc va, luc va
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: su sach ky nang xa hoi. ((hieu van) or (hieu va)) cam ((xuc va) or (thuc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu van) OR (hieu va)) cam ((xuc va) OR (thuc va)) hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu van) or (hieu va)) cam ((xuc va) or (thuc va)) hanh vai cua te*.