Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
nang xa » lang xa, nang ma, mang xa
huu ban » huu bang, huu han, cuu ban
van hoc » van hoa
su sac » su sach, su cac
su xac » pu xac, su cac

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 sac) OR (su xac)) ky ((nang xa) OR (nang x)) hoi. hieu van hoc huu ban thanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ky ((nang xa) or (nang x)) hoi. hieu van hoc huu ban thanh tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ky ((nang xa) or (nang x)) hoi. hieu van hoc huu ban thanh tai cua tre*.