Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trang » canh tranh, banh trang, thanh trang
hanh trang » thanh trung, canh tranh, hanh trinh
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - ((canh trang) or (hanh trang)) va nhung ((cong dan) OR (cong tan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((canh trang) OR (hanh trang)) va nhung ((cong dan) OR (cong tan)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((canh trang) or (hanh trang)) va nhung ((cong dan) OR (cong tan)) phan tu".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((canh trang) or (hanh trang)) va nhung ((cong dan) OR (cong tan)) phan tu*.