Perhaps you should try some spelling variations:
quan nhung » qua nhung, cua nhung, quang hung
luan chung » luan chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
van doanh » toan doanh, van dong, van thanh
hoc hieu » hoc thieu, hoc hien, doc hieu
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham 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 hieu manh - van doanh ((quan nhung) OR (luan chung)) cong ((tac toan) or (tam toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - van doanh ((quan nhung) OR (luan chung)) cong ((tac toan) OR (tam toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - van doanh ((quan nhung) OR (luan chung)) cong ((tac toan) or (tam toan)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - van doanh ((quan nhung) OR (luan chung)) cong ((tac toan) or (tam toan)) tap*.