Perhaps you should try some spelling variations:
thanh hoa » thanh pho
ban thanh » ban hanh, ban hang
cua tre » cua te, cuu tre, cua triet
cao duc » dao duc, cao suc, giao duc
hoa cua » hoa chat, hoa xuat
cam duc » cam xuc, pham duc, nam duoc
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
su sac » su sach, su cac, su xac

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 ve ((cam duc) or (cao duc)) ban thanh hoa cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky dang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) ban thanh hoa cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. hieu ve ((cam duc) or (cao duc)) ban thanh hoa cua tre*.