Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, ban than, van than
than tu » thanh tu, thang tu, phan tu

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