Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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 tran van nhung cong ((dan than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tran van nhung cong ((dan than) OR (ban than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tran van nhung cong ((dan than) OR (ban than)) cau*.