Perhaps you should try some spelling variations:
nguong manh » nguong dan, duong manh, luong manh
lang nguong » tang nguon, hang nguon, lang muong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
long quan » luong quan, long quang, hong quan
tong quan » thong quan, tong luan, luong 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 (tong quan)) lang nguong 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 (tong quan)) lang nguong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (chieu xanh)) - thang ((long quan) OR (tong quan)) lang nguong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu xanh)) - thang ((long quan) OR (tong quan)) lang nguong manh toan ban*.