Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
dung cong » dung trong
cong cong » cong dong, trong cong, dang cong
khoan cam » khoa cam, khoan va, phan cam
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
khan cap » khan ap, than cap, phan cac

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 tang cua ((dung cong) or (cong cong)) san ((khan cap) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - anh tang cua ((dung cong) OR (cong cong)) san ((khan cap) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - anh tang cua ((dung cong) or (cong cong)) san ((khan cap) or (khoan cam))*.