Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, thong thong, phong chong
tong cong » trong cong, cong cong, dung cong
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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