Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
dan vai » dan va, dan tai, dan vat
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xa hoi. hieu vien cac ((xuc va) or (luc va)) dan vai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu vien cac ((xuc va) OR (luc va)) dan vai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu vien cac ((xuc va) or (luc va)) dan vai ((cua tre) or (su triet))*.