Perhaps you should try some spelling variations:
quang dung » quang trung, ung dung, cuong dung
hieu xanh » chieu xanh, hieu manh, hieu nganh
quan dung » quan duong, qua dung, quan dong
cong tinh » cong trinh, cong vinh, long tinh
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » 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: doc hieu xanh - hanh chinh ((quan dung) or (quang dung)) cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh chinh ((quan dung) OR (quang dung)) cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh chinh ((quan dung) or (quang dung)) cong tinh toan cau*.