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
hoc thiet » hoc thieu, hoc thuyet, hoc hien
doanh cua » doanh luan
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - hanh doanh cua ((thong cong) OR (trong cong)) ((dan toan) or (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh doanh cua ((thong cong) OR (trong cong)) ((dan toan) OR (manh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - hanh doanh cua ((thong cong) OR (trong cong)) ((dan toan) or (manh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - hanh doanh cua ((thong cong) OR (trong cong)) ((dan toan) or (manh toan)) ban*.