Perhaps you should try some spelling variations:
vien nganh » vien thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
tranh qua » tranh cua, thanh qua, trinh qua
song cong » cong cong, tong cong, song hong
cong tinh » cong trinh, cong vinh, long tinh
tinh van » trinh van, dinh van, tinh va

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))) or (vien nganh)) - canh tranh qua song cong tinh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((((hieu xanh) OR (chieu xanh))) OR (vien nganh)) - canh tranh qua song cong tinh van ban.
• Adding a wildcard symbol may retrieve word variants: doc ((((hieu xanh) or (chieu xanh))) or (vien nganh)) - canh tranh qua song cong tinh van ban*.