Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
cong dan » cong san, cong tan, huong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu
hang dau » hang va, hang tai

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