Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu tinh, hieu manh
chieu sang » hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, hieu cach
cong quang » luong quang, thong quang, duong quang
quang than » quang thanh, quang thang, quang tuan
trung cad » trung cap, trung ca, trung can
cad trong » cay trong, ca trong, chat trong
than cau » toan cau, phan cau, than cap

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