Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh hang » thanh hang, hang hang, hanh han
cua nhung » va nhung
ca nhung » cam nhung, va nhung, ca nung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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