Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu vi » hieu voi, hieu va, hieu ve
duc ban » duc tan, duc van, dua ban
cua tre » cuu tre, cua triet, dua tren
su sac » su sach, su cac, su xac
cua te » cua tu
pham » phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky tang) or (ky dang)) xa hoi. hieu vi pham duc ban thanh hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky dang)) xa hoi. hieu vi pham duc ban thanh hai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. hieu vi pham duc ban thanh hai ((cua tre) or (cua te))*.