Perhaps you should try some spelling variations:
luat phuong » luat thuong, luan phuong, xuat phuong
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
canh trinh » canh tranh, hanh trinh, canh tinh
dong van » duong van, dang van, dong va
dong von » dung von, dong co, dong hoc
chat cao » chat co, chat cho, chat bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) OR (chieu sang)) - canh trinh luat phuong ((dong van) or (dong von)) chat cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - canh trinh luat phuong ((dong van) OR (dong von)) chat cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sang)) - canh trinh luat phuong ((dong van) or (dong von)) chat cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sang)) - canh trinh luat phuong ((dong van) or (dong von)) chat cao*.