Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh tang » hanh trang, anh tang, hanh mang
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, hang cua, tang luan
than ban » thanh ban, than man, nhuan ban
toan ban » van ban

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