Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tuan dang » tuan bang, tuan dung, tuan duong
tran dang » tran quang, tran hoang, tranh hang
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 - thanh trung ((tuan dang) OR (tran dang)) nong ((van than) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((tuan dang) OR (tran dang)) nong ((van than) OR (van tuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh trung ((tuan dang) OR (tran dang)) nong ((van than) or (van tuan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((tuan dang) OR (tran dang)) nong ((van than) or (van tuan)) cao*.