Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, hieu lang
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan

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 (thieu quang)) - thanh trung cua dung trong ((van than) OR (van tuan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - thanh trung cua dung trong ((van than) OR (van tuan)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu quang)) - thanh trung cua dung trong ((van than) OR (van tuan)) cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu quang)) - thanh trung cua dung trong ((van than) OR (van tuan)) cap*.