Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien cac » hien cac, thien cau, thieu cac
dinh vai » dinh van, dinh vi, dinh va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
lo van » le van, vo van, so van
lo va » lao va, ly va, le va

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 thien cac ((lo va) or (lo van)) dinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu thien cac ((lo va) OR (lo van)) dinh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu thien cac ((lo va) or (lo van)) dinh vai cua tre*.