Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
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)) - canh tranh cua ((nhung cong) OR (thong cong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - canh tranh cua ((nhung cong) OR (thong cong)) dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (chieu sach)) - canh tranh cua ((nhung cong) OR (thong cong)) dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu sach)) - canh tranh cua ((nhung cong) OR (thong cong)) dan than ban*.