Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
luong quan » thong quan, duong qua
tang nguon » tang nguyen, dung nguon, bang ngon
nguon manh » nguyen manh, ngo manh, nguoi lanh
hieu xanh » hieu manh, hieu nganh, dieu hanh
long quan » long quang, tong quan, hong quan
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (chieu xanh)) - thang ((long quan) or (luong quan)) tang nguon manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - thang ((long quan) OR (luong quan)) tang nguon manh toan ban.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu xanh)) - thang ((long quan) or (luong quan)) tang nguon manh toan ban*.