Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
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 man » than ma, thanh san, tran manh

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