Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
dung thuong » dung trong, hang thuong, cong thuong
chieu sang » chieu sach, chieu xanh, hieu lang
thuong ban » thuong han, thuong lan, tuong ban
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cap » truong cao, trung tam
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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