Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham duc » pham duc, cham soc, pham duy
dua tren » dung tren
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, ban hanh
hanh le » thanh le, hanh ve, hanh de
le dua » le duan, le cua, le duc

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky nang xa hoi. hieu vu cham duc va hanh le dua tren~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. hieu vu cham duc va hanh le dua tren*.