Perhaps you should try some spelling variations:
vien dai » hien dai
hanh tai » thanh tai, hang tai, han tai
ban hanh » ban hang
cua tre » cuu tre, cua triet, dua tren
dua ban » dia ban, cua ban, qua ban
te sach » toc sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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: te sach y nang xa hoi. hieu ((ve cam) OR (vien dai)) dua ban hanh tai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu ((ve cam) or (vien dai)) dua ban hanh tai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu ((ve cam) or (vien dai)) dua ban hanh tai ((cua tre) OR (cua te))*.