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
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
hieu va » lieu va, hieu qua
hieu ve » hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
xac ky » cac ky, sac ky, bac ky
su xac » pu xac, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky tang xa hoi. ((hieu ve) OR (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 xac ky tang xa hoi. ((hieu ve) OR (hieu va)) cham duc ban ((thanh hai) OR (thanh phan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky tang xa hoi. ((hieu ve) OR (hieu va)) cham duc ban ((thanh hai) or (thanh phan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su xac ky tang xa hoi. ((hieu ve) OR (hieu va)) cham duc ban ((thanh hai) or (thanh phan)) cua tre*.