Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
tan thanh » tran thanh, tang thanh, toan thanh
cham duc » pham duc, pham duy, phan duc
phan cua » nhan cua, than cua, phat cua
cua tre » cua te, cuu tre, cua triet
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 ((cham duc) or (cham soc)) tan thanh phan 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 ((cham duc) OR (cham soc)) tan thanh phan cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. hieu ve ((cham duc) or (cham soc)) tan thanh phan cua tre*.