Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
vat nhung » vap nhung, vai nhung, ve nhung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan dau » phan tu, hang dau

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

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