Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
chieu sang » chieu sach, chieu xanh, hieu lang
cuong danh » cuon danh, huong dan, cuong linh
doi chieu » doc hieu, doi chi, ho chieu
lanh manh » lan anh, van manh, anh anh
cua nhung » va nhung
cong danh » cong dan, cong thanh, cong khanh

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 manh) or (lanh tranh)) cua nhung ((cong danh) OR (cuong danh)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((lanh manh) OR (lanh tranh)) cua nhung ((cong danh) OR (cuong danh)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((lanh manh) or (lanh tranh)) cua nhung ((cong danh) OR (cuong danh)) phan tu".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((lanh manh) or (lanh tranh)) cua nhung ((cong danh) OR (cuong danh)) phan tu*.