Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sang » chieu sach, chieu xanh, hieu lang
lanh tranh » lan tranh, hanh trinh, sach tranh
doi chieu » doc hieu, doi chi, ho chieu
va phuong » va thuong, cac phuong
cong dan » cong san, cong tan, huong dan

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 - ((lanh tranh) or (canh tranh)) va phuong cong dan ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((lanh tranh) OR (canh tranh)) va phuong cong dan ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((lanh tranh) or (canh tranh)) va phuong cong dan ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((lanh tranh) or (canh tranh)) va phuong cong dan ((toan ban) OR (van ban))*.