Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chieu xanh, hieu cach
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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