Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hien cac » thien cac, vien cac, dien cac
dinh vai » dinh van, dinh vi, dinh va
hieu cac » hieu luc, hieu va, hieu van
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
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) OR (hieu cac)) lo va dinh vai ((cua tre) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) lo va dinh vai ((cua tre) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) lo va dinh vai ((cua tre) or (su triet))*.