Perhaps you should try some spelling variations:
huong quang » phuong quang, thuong quang, luong quang
quang dung » quang trung, ung dung, cuong dung
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
nhan cau » nhanh cau, phan cau, nhan sau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - anh huong quang dung ((cong ban) OR (cong san)) nhan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - anh huong quang dung ((cong ban) or (cong san)) nhan cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - anh huong quang dung ((cong ban) or (cong san)) nhan cau*.