Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
cua nhung » va nhung
hanh ban » thanh ban, hang ban, hanh san
tac toan » tam toan, hach toan, tich toan
tap toan » tap quan, bai toan
tap doan » tap quan
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh ban cua nhung cong ((tac toan) or (((tap toan) OR (tap doan)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh ban cua nhung cong ((tac toan) OR (((tap toan) OR (tap doan)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh ban cua nhung cong ((tac toan) or (((tap toan) OR (tap doan)))) cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ban cua nhung cong ((tac toan) or (((tap toan) OR (tap doan)))) cau*.