Perhaps you should try some spelling variations:
luat truong » luat thuong, luat trong, xuat truong
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
hanh trinh » canh tranh, hanh chinh
cong thanh » dong thanh, cong trinh, truong thanh
cong tan » cong tac, cong san, cong ty
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu quang)) - hanh trinh luat truong ((cong tan) OR (cong thanh)) ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu quang)) - hanh trinh luat truong ((cong tan) OR (cong thanh)) ran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu quang)) - hanh trinh luat truong ((cong tan) OR (cong thanh)) ran cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu quang)) - hanh trinh luat truong ((cong tan) OR (cong thanh)) ran cau*.