Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » thong cong, hang cong, nhung don
hien xanh » hien hanh, hien nhanh, hien khanh
dung cong » dung trong
dan thang » danh thang, van thang, dai thang
tranh va » tranh van, trang va, trinh va
thang tu » thong tu, thanh tu, hang 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) or (chieu xanh)) - hanh tranh va ((nhung cong) or (dung cong)) dan thang tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - hanh tranh va ((nhung cong) OR (dung cong)) dan thang tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh tranh va ((nhung cong) or (dung cong)) dan thang tu*.