Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trung quan » truong quan, trong quan, trung tuan
hoc chieu » hoc thieu, ho chieu, hoc hien
trung qua » trong qua, trung cua, truong quan
trong hai » trong thai, trong tai, trong hoat
hai quan » tac quan
quan ban » quang ban, qua ban, quan van

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 qua) or (trung quan)) dung trong hai quan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - thanh ((trung qua) OR (trung quan)) dung trong hai quan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - thanh ((trung qua) or (trung quan)) dung trong hai quan ban*.