Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
tranh he » trinh he, tranh ha, tinh he
cong van » cong vang, cong san, song van
van quan » van ban
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 he thong cong van quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - canh tranh he thong cong van quan ha*.