Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien cac » hien cac, thien cau, thieu cac
cua triet » cua viet, su triet, va triet
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
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, dua tren
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly 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 dinh vai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu thien cac lo va dinh vai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu thien cac lo va dinh vai ((cua tre) or (cua triet))*.