Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
luat chung » luan chung, luat thuong, cua chung
hieu lang » chieu sang, hieu quang, nhieu tang
luat cong » thuat cong, cua cong, luat canh
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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