Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
cuu tre » cua tre, cau treo
su sach » so sach, vu sach
van hac » van hoc, van ha, van hai
hac tuc » thac toc, thai tuc
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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 ((y nang) OR (v nang)) xa hoi. thien van hac tuc van hanh vai ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (v nang)) xa hoi. thien van hac tuc van hanh vai ((cuu tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. thien van hac tuc van hanh vai ((cuu tre) OR (cau tren))*.