Perhaps you should try some spelling variations:
vien nganh » vien thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
thang long » thanh cong
hieu manh » hieu nganh, dieu hanh, hien hanh
tranh va » tranh van, trang va, trinh va
va thang » van thang, va thanh, va thong
long san » long span, luong san, cong san
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((((hieu manh) or (vien nganh))) or (chieu xanh)) - canh tranh va thang long san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu manh) OR (vien nganh))) OR (chieu xanh)) - canh tranh va thang long san than cao.
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu manh) or (vien nganh))) or (chieu xanh)) - canh tranh va thang long san than cao*.