Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cuu tre » cua tre, cau tren, cau treo
duc van » duc va, duc tan, duc manh
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu van
hai cuu » hai cua, hai chu, hai cuc
hieu va » lieu va, hieu qua
duc ban » duc tan, dua ban, duc man
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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 xa hoi. ((hieu ve) or (hieu va)) cam ((duc ban) OR (duc van)) thanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. ((hieu ve) OR (hieu va)) cam ((duc ban) OR (duc van)) thanh hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. ((hieu ve) or (hieu va)) cam ((duc ban) OR (duc van)) thanh hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. ((hieu ve) or (hieu va)) cam ((duc ban) OR (duc van)) thanh hai cuu tre*.