Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
manh trung » manh tung, thanh trung, manh hung
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
tong dan » tuong dan, thong dan, trong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
hoc han » hoc phan, hoc hanh, hoc chan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((manh trung) or (thanh tung)) hoc han tong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((manh trung) OR (thanh tung)) hoc han tong dan toan ban*.