Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tang cua » mang cua, hang cua, tang luan
toan cao » toan tap
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: theo tieu xanh - hanh tang cua ((hang cong) or (dang cong)) dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh tang cua ((hang cong) OR (dang cong)) dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang cua ((hang cong) or (dang cong)) dan ((toan cao) or (toan ban))*.