Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
tang luan » dung luan
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
anh tang » anh bang, anh dang, anh nang
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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 - anh tang luan ((hang cong) or (dang cong)) tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - anh tang luan ((hang cong) OR (dang cong)) tac ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - anh tang luan ((hang cong) or (dang cong)) tac ((toan cau) or (toan tap))*.