Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
ban cong » bang cong, van cong, phan cong
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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