Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tong » thanh tung, thanh long, thanh hong
cong song » cong dong, cong cong, song song
qua cong » cua cong, qua song, va cong
song van » hoang van, trong van, duong van
van tan » van tuan, van ban, van tai
tan ca » tan cua, tang ca, dan ca

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)) - ((thanh tong) or (thanh cong)) qua cong song van tan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - ((thanh tong) OR (thanh cong)) qua cong song van tan ca.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - ((thanh tong) or (thanh cong)) qua cong song van tan ca*.