Perhaps you should try some spelling variations:
thanh tien » thanh vien, thanh nien, thang tien
ban thanh » ban hanh, ban hang
tang khu » tai khu, tang ha, tang thi
tien cua » trien cua, tiep cua, dien cua
sang ky » sang kyo, dang ky, bang ky
tang ky » dang ky, trong ky
qua cac » cua cac
cac tac » cac toc, cac bac, cac dac
tac ban » tai ban, cac ban, tao ban
cua tre » cua te, cuu tre, cua triet
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: so ((sang ky) OR (((tang ky) OR (tang khu)))) nang x hoi. hieu qua cac tac ban thanh tien cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sang ky) or (((tang ky) OR (tang khu)))) nang x hoi. hieu qua cac tac ban thanh tien cua tre~".
• Adding a wildcard symbol may retrieve word variants: so ((sang ky) or (((tang ky) OR (tang khu)))) nang x hoi. hieu qua cac tac ban thanh tien cua tre*.