Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
thanh tran » thanh trang, thanh toan, thanh tra
van khang » van khanh, van thanh, van hanh
van quang » van quan, tran quang, ban quan
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan tai » toan tai, quan tai, tan tai

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) or (chieu xanh)) - thanh tran ((van khang) OR (van quang)) cong van tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - thanh tran ((van khang) OR (van quang)) cong van tuan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (chieu xanh)) - thanh tran ((van khang) OR (van quang)) cong van tuan tai".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu xanh)) - thanh tran ((van khang) OR (van quang)) cong van tuan tai*.