Perhaps you should try some spelling variations:
duong trong » dung trong
hieu nganh » vien nganh, hiem ngan, hieu manh
luan duong » tuan duong, luan luong, luan dong
hieu xanh » chieu xanh, hieu manh, dieu hanh
nhan dang » nhan dan, phan dang, tran dang
dang luan » dung luan, tang luan, hang luan
ban than » ban thanh, van thanh, ban hang
van tai » von tai, van tuan

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 (hieu nganh)) - nhan dang luan duong trong ((ban than) or (van tai)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - nhan dang luan duong trong ((ban than) OR (van tai)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (hieu nganh)) - nhan dang luan duong trong ((ban than) or (van tai)) cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (hieu nganh)) - nhan dang luan duong trong ((ban than) or (van tai)) cau*.