Perhaps you should try some spelling variations:
vien cao » vien cac, vien da, vien va
thuc van » thuc vat, thuc dan, thuc va
vien dai » hien dai
van anh » van thanh, tuan anh, van minh
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua tre » cua te, cuu tre, cua triet
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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 ((ty nang) OR (ty hang)) xa hoi. hieu ((vien cao) OR (vien dai)) thuc van anh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (ty hang)) xa hoi. hieu ((vien cao) OR (vien dai)) thuc van anh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty hang)) xa hoi. hieu ((vien cao) OR (vien dai)) thuc van anh vi cua tre*.