Perhaps you should try some spelling variations:
tieu tinh » trieu tinh, tieu trinh, lieu tinh
hanh hang » thanh hang, hang hang, hanh han
hang luan » tang luan, dung luan
luan hung » luan chung, lan hung, luan ung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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