Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cong ngang » cong nhan, cong lang, cong nong
cong quang » luong quang, thong quang, duong quang
trung cua » truong cua, trung tuan, trung cap
nhung cau » chung cu, nhung bai, nhu cau
cua dong » chua dong, cua cong, cua dang

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)) - thanh trung cua dong ((cong ngang) OR (cong quang)) nhung cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - thanh trung cua dong ((cong ngang) OR (cong quang)) nhung cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - thanh trung cua dong ((cong ngang) OR (cong quang)) nhung cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - thanh trung cua dong ((cong ngang) OR (cong quang)) nhung cau*.