Perhaps you should try some spelling variations:
cong hoang » thong hoang, vuong hoang, cong dong
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh cong » thanh cong, hang cong, hanh dong
cong hoan » cong hoa, dong hoa, cong san
nhan dan » phan dau, gian dan, nhan tai
cong cu » chung cu
cu dang » cua dang, su dang, vu dang

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 cong cu dang ((cong hoang) or (cong hoan)) nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh cong cu dang ((cong hoang) OR (cong hoan)) nhan dan*.