Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh hai » thanh hoa, thanh san
cham duc » pham duc, cham soc, pham duy
kho tang » cao tang
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
va cham » va chat, va tham
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
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 ((kho tang) or (ky dang)) xa hoi. hieu va cham duc ban ((thanh hai) or (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((kho tang) OR (ky dang)) xa hoi. hieu va cham duc ban ((thanh hai) OR (thanh phan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((kho tang) or (ky dang)) xa hoi. hieu va cham duc ban ((thanh hai) or (thanh phan)) cua tre*.