Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
tac chuan » tac quan, tac cua, tac can
chuan cau » chuan chau, chua cau, chuan chat
tung tam » trung tam, vung tam, dung tam

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