Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung quang » truong quang, trong quang, trung quan
chieu sach » chinh sach, chieu sang, chieu xanh
quang dung » quang trung, ung dung, cuong dung
dung cuong » dung cong, dung luong, dang cuong
cuong tap » luong tap, cong tac, luong tai
toan cao » toan tap
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: theo ((chieu sach) OR (chiet tach)) - thanh trung quang dung cuong tap ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - thanh trung quang dung cuong tap ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - thanh trung quang dung cuong tap ((toan cao) or (toan ban))*".