Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
chieu lang » chieu sang, chi lang, chieu xanh
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, nhieu tang
luat hang » luat hanh, luat chung, luat huong
cong manh » cong danh, duong manh, hoang manh
toan cau » toan cao, toan ban, toan tap

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