Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh doanh » hang doanh, chinh doanh, doanh doanh
thong cong » tong cong, thong thong, phong chong
doanh cua » doanh luan
so thiet » soc thiet, hoc thiet, hoa thiet
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: so thiet tach - hanh doanh cua ((thong cong) or (trong cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so thiet tach - hanh doanh cua ((thong cong) OR (trong cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: so thiet tach - hanh doanh cua ((thong cong) or (trong cong)) dan toan ban*.