Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
trung quan » truong quan, trong quan, trung tuan
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
quan dung » quang dung, quan duong, qua dung
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (chieu xanh)) - thanh trung quan dung ((cong thanh) or (dong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - thanh trung quan dung ((cong thanh) OR (dong thanh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu xanh)) - thanh trung quan dung ((cong thanh) or (dong thanh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu xanh)) - thanh trung quan dung ((cong thanh) or (dong thanh)) toan ban*.