Perhaps you should try some spelling variations:
thanh luong » thanh huong, thanh long, thanh cuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
quan dung » quang dung, quan duong, quan dong
qua dung » quang dung, su dung, qua song
van toan » van tan, van thanh, manh toan
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 chieu xanh - thanh luong ((quan dung) OR (qua dung)) cong ((van toan) or (van tuan)) tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh luong ((quan dung) OR (qua dung)) cong ((van toan) OR (van tuan)) tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - thanh luong ((quan dung) OR (qua dung)) cong ((van toan) or (van tuan)) tai".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh luong ((quan dung) OR (qua dung)) cong ((van toan) or (van tuan)) tai*.