Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
tu sach » thu sach, su sach, tu cach
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
ve cac » va cac, vien cac
vi cua » vai cua, di cua
ve cai » va cai, ve tai, ve cau
x hoi » xa hoi, o hoi, x ho

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: ((tu sach) OR (te sach)) ky nang x hoi. hieu ((ve cai) OR (ve cac)) thuc van hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. hieu ((ve cai) or (ve cac)) thuc van hanh vi cua tre*.