Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
tranh va » tranh van, trang va, trinh va
san quan » van quan, ban quan, dan quan
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 ((tong cong) OR (cong cong)) san quan 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) OR (cong cong)) san quan ha*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - canh tranh va ((tong cong) OR (cong cong)) san quan ha*".