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
trung tran » trung tuan, trung thanh, trung tam
cong quang » luong quang, thong quang, duong quang
tran dang » tran quang, tran hoang, tranh hang
dang cong » dung cong
toan tap » toan ban
phan cau » phan dau, phan cac, phan tu

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