Perhaps you should try some spelling variations:
thanh tiep » thanh hiep, thanh tien, thanh thieu
ban thanh » ban hanh, ban hang
tiep cua » tiep can, dieu cua, tap cua
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang 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, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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 nang ((x hoi) OR (o hoi)). hieu qua cac tac ban thanh tiep cua tre~.
• Adding a wildcard symbol may retrieve word variants: so sang ky nang ((x hoi) or (o hoi)). hieu qua cac tac ban thanh tiep cua tre*.