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 » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, hien khanh
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
thang tu » thong tu, thanh tu, hang tu
than tu » thanh tu, phan tu, tran 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 dan ((than tu) OR (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 dan ((than tu) OR (thang tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - hanh tranh va nhung cong dan ((than tu) OR (thang tu))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh tranh va nhung cong dan ((than tu) OR (thang tu))*.