Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
thien quan » trien quang, lien quan, thien van
trung tuan » trung thanh, trung tam, tran tuan
nguong dan » huong dan
tuan dang » tran dang, tuan bang, tuan dung
nong dan » cong dan, nong san, huong dan
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 ((thieu sang) or (thien quan)) - thanh trung tuan dang ((nong dan) or (nguong dan)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thien quan)) - thanh trung tuan dang ((nong dan) OR (nguong dan)) than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thien quan)) - thanh trung tuan dang ((nong dan) or (nguong dan)) than cap*.