Perhaps you should try some spelling variations:
dua tren » dung tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu te » hieu ve, hien te, hieu he
va hanh » van hanh, va thanh, ban hanh
te ban » te bao
vi dua » vi du, vi dum, vi lua
x hoi » xa hoi, o hoi, x ho
do va » do van

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x hoi. hieu te ban do va hanh vi dua tren~.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu te ban do va hanh vi dua tren*.