Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
sang mai » sang ma, sang tai, lang mai
ky sang » ky nang, ky dang, ky tang
vai cuu » vai cua
hieu ve » hieu van
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cua tre, cau tren, cau treo
suc va » duc va, tuc va, soc va
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky sang mai hoi. ((hieu ve) or (hieu va)) cao ((suc va) OR (luc va)) thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky sang mai hoi. ((hieu ve) OR (hieu va)) cao ((suc va) OR (luc va)) thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky sang mai hoi. ((hieu ve) or (hieu va)) cao ((suc va) OR (luc va)) thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky sang mai hoi. ((hieu ve) or (hieu va)) cao ((suc va) OR (luc va)) thanh vai cuu tre*.