Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
cad trong » ca trong, chat trong, nam trong
cong danh » cuong danh, cong dan, cong thanh
cong anh » dong anh, hong anh, cong thanh
tuan ban » tuan bang, toan ban, luan ban

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