Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
cua trong » cua truong, cua trung, qua trong
canh dan » sanh dan, thanh dan, cac dan
canh van » anh van, can van, cach van
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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