Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
luc va » tuc va, loc 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 vu nang xa hoi. thi van cham ((luc va) OR (duc va)) hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach vu nang xa hoi. thi van cham ((luc va) OR (duc va)) hanh vi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: su sach vu nang xa hoi. thi van cham ((luc va) OR (duc va)) hanh vi ((cua tre) or (cuu tre))*.