Perhaps you should try some spelling variations:
doanh sai » doanh tai, danh sai, doan sai
cua triet » su triet, va triet
hoa doanh » toan doanh, hoa dan
cua viet » ca viet, hoa viet, cua vat
thu hoa » thu hoan, thu hoai, thuy hoa
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu he » hieu ve, hieu le, hieu hien
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
hiem he » hiem xe, thien he, hiem cho
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang ma hoi. ((hieu he) or (hiem he)) nam thu hoa doanh sai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ma hoi. ((hieu he) OR (hiem he)) nam thu hoa doanh sai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ma hoi. ((hieu he) or (hiem he)) nam thu hoa doanh sai ((cua triet) or (cua viet))*.