Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
dung cong » dung trong
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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 - ((canh manh) or (lanh manh)) cua ((nhung cong) or (dung cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((canh manh) OR (lanh manh)) cua ((nhung cong) OR (dung cong)) van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((canh manh) or (lanh manh)) cua ((nhung cong) or (dung cong)) van toan cau*.