Perhaps you should try some spelling variations:
danh dau » lanh dao, hang dau, danh tu
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
qua cam » qua cham, qua cac, qua ca
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
luc 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: vu sac ky tang xa hoi. hieu qua cam ((luc va) or (duc va)) danh dau ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky tang xa hoi. hieu qua cam ((luc va) OR (duc va)) danh dau ((cuu tre) OR (cua tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky tang xa hoi. hieu qua cam ((luc va) or (duc va)) danh dau ((cuu tre) OR (cua tre))*".