Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
cong van » cong san, song van, cong tan
than ma » than man, than va, khan ma

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