Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh trinh » canh tranh, hanh chinh
luat chung » luan chung, luat thuong, cua chung
cong thanh » dong thanh, cong trinh, truong thanh
cong tan » cong tac, cong san, cong ty
toan tap » toan ban

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