Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
va doanh » van doanh, va danh, hoa doanh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cac tac » cac toc, cac bac, cac dac
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ma hoa. hieu ve cac tac ((va doanh) OR (vay doanh)) van ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ma hoa. hieu ve cac tac ((va doanh) OR (vay doanh)) van ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky tang ma hoa. hieu ve cac tac ((va doanh) OR (vay doanh)) van ((cua tre) or (cuu tre))*".