Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trung » thanh trung, hanh trang, manh trung
quang dung » quang trung, cuong dung
hoc thieu » toc thieu, hoc hien
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - hanh trung ((quang dung) or (ung dung)) cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trung ((quang dung) OR (ung dung)) cong san than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trung ((quang dung) or (ung dung)) cong san than cau*.