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
thai tuc » thai thuc, thai thuy, thai hoc
van thai » van thoai, van tai, van hai
tai cua » thai cua, tai cuc, tri cua
tuc ban » thuc ban, truc ban, tu ban
sach ky » sach y, sach kem, sach hay
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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