Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
luat hang » luat hanh, luat chung, luat quang
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((cchieu sang) OR (chieu sang)) - canh trinh luat hang ((cong manh) OR (cong danh)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((cchieu sang) or (chieu sang)) - canh trinh luat hang ((cong manh) OR (cong danh)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((cchieu sang) or (chieu sang)) - canh trinh luat hang ((cong manh) OR (cong danh)) toan cau*.