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