Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
tac quang » thac quang, tac quan, tai quang
quang cao » nang cao, quang nam
tang cua » mang cua, hang cua, thong cua
cong tac » cong ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sach)) - hanh ((tang cua) OR (tang luan)) nhung cong tac quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - hanh ((tang cua) OR (tang luan)) nhung cong tac quang cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - hanh ((tang cua) OR (tang luan)) nhung cong tac quang cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - hanh ((tang cua) OR (tang luan)) nhung cong tac quang cao*.