Perhaps you should try some spelling variations:
truong chung » truong trung
thanh trung » thanh tung
quoc truong » quoc trung, quoc trong, hoc truong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
dinh toan » tinh toan, hinh toan, dinh than
minh toan » tinh toan, manh toan, minh tuan

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 sang) or (hieu lang)) - thanh trung quoc truong chung ((dinh toan) OR (minh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung quoc truong chung ((dinh toan) OR (minh toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung quoc truong chung ((dinh toan) OR (minh toan)) tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung quoc truong chung ((dinh toan) OR (minh toan)) tap*.