Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cong tac » cong ty
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
tang va » trang va, tang van, thang va

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