Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hang hang » nang hang, cang thang, hung thang
ca chang » ca chung, co chang, san chang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ca hang » cua hang, va hang, ca tang

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 - hang hang ((ca hang) or (ca chang)) cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hang hang ((ca hang) OR (ca chang)) cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hang hang ((ca hang) or (ca chang)) cong dan toan cao*.