Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh tang » hanh trang, anh tang, hanh mang
nhung don » nhung van, nhung bo
dang cong » dung cong
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, manh toan
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 don) or (dang cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh tang cua ((nhung don) OR (dang cong)) dan toan ban*.