Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
ve triet » va trien
su triet » su viet, su tien
hien cac » thien cac, vien cac, hieu cac
dinh vai » dinh van, dinh vi, dinh va
va dinh » van dinh, va kinh, va tinh
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu hien cac lo va dinh vai ((cua tre) OR (((su triet) OR (ve triet))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu hien cac lo va dinh vai ((cua tre) or (((su triet) OR (ve triet))))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu hien cac lo va dinh vai ((cua tre) or (((su triet) OR (ve triet))))*.