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