Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
dinh vai » dinh van, dinh vi, dinh va
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
cac lop » cac hop, cac loai
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac lo » cac co, cac bo, cac ho

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: tu sach ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va dinh vai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va dinh vai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va dinh vai ((cua tre) OR (cua triet))*.