Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
tong cong » trong cong, cong cong, dung cong
tranh va » tranh van, trang va, trinh va
cong van » cong vang, cong san, song van
va tong » va thong, va tuong, va trong
ban ha » ban nha, ban ham, ban pha

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien hanh)) - canh tranh va tong cong van ban ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - canh tranh va tong cong van ban ha.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - canh tranh va tong cong van ban ha*.