Perhaps you should try some spelling variations:
trung thang » trung thanh, trung tang, truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
trung tham » trung tam, trung thanh, trung ha
hoc chieu » hoc thieu, ho chieu, hoc hien
cong danh » cuong danh, cong thanh, cong khanh
cong dan » cong san, cong tan, huong dan
toan cao » toan ban, toan tap

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 - thanh ((trung tham) or (trung thang)) dung ((cong danh) OR (cong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - thanh ((trung tham) OR (trung thang)) dung ((cong danh) OR (cong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - thanh ((trung tham) or (trung thang)) dung ((cong danh) OR (cong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - thanh ((trung tham) or (trung thang)) dung ((cong danh) OR (cong dan)) toan cao*.