Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
vat phuong » va phuong, van phuong, viet phuong
trinh vat » trinh van, trinh luat, sinh vat
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan dau » 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: ho chieu sang - canh trinh vat phuong ((cong dan) or (cong san)) ((phan tu) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - canh trinh vat phuong ((cong dan) OR (cong san)) ((phan tu) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - canh trinh vat phuong ((cong dan) or (cong san)) ((phan tu) or (phan dau))*.