Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
dung song » dung cong, dung dong, vung song
tranh va » tranh van, trang va, trinh va
song van » hoang van, trong van, duong van
van quan » van ban
va dung » van dung, va duong, vat dung
quan ha » quan he

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 dung song van quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - canh tranh va dung song van quan ha.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - canh tranh va dung song van quan ha*.