Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » hanh trinh, hanh trang, lanh tranh
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
cua nhung » va nhung
tan tranh » tan tran, lan tranh, tan thanh
can tranh » tan tran, van ranh, co tranh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - ((hanh tranh) or (canh tranh)) cua nhung cong ((tan tranh) OR (can tranh)) luan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - ((hanh tranh) OR (canh tranh)) cua nhung cong ((tan tranh) OR (can tranh)) luan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - ((hanh tranh) or (canh tranh)) cua nhung cong ((tan tranh) OR (can tranh)) luan".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((hanh tranh) or (canh tranh)) cua nhung cong ((tan tranh) OR (can tranh)) luan*.