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, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tac han » tac nhan, tac ha, tac van
tac can » tac van, tac quan, tac vang

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