Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh quan » tranh quang, trinh quan, tranh luan
quan nhung » qua nhung, cua nhung, luan chung
cong quang » luong quang, thong quang, duong quang
cong lang » cong vang, cong luong, cong ngang
thanh cao » thanh ca, thanh cac, thanh thao

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 xanh) or (chieu xanh)) - canh tranh quan nhung ((cong lang) OR (cong quang)) thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh quan nhung ((cong lang) OR (cong quang)) thanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - canh tranh quan nhung ((cong lang) OR (cong quang)) thanh cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - canh tranh quan nhung ((cong lang) OR (cong quang)) thanh cao*.