Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
dan danh » van danh, ban danh, dai danh
han danh » van danh, phan dang, nhan 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 tranh cua ((nhung don) or (hang cong)) ((dan danh) OR (han danh)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh tranh cua ((nhung don) OR (hang cong)) ((dan danh) OR (han danh)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tranh cua ((nhung don) or (hang cong)) ((dan danh) OR (han danh)) tu".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh cua ((nhung don) or (hang cong)) ((dan danh) OR (han danh)) tu*.