Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
cong thanh » dong thanh, cong trinh, truong thanh
canh manh » lanh manh, canh tranh, cach mang
cua chong » cua cong, cua chung, cua khong
manh cua » doanh cua, ban cua
cong tan » cong tac, cong san, cong ty
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 ((chinh sach) or (hieu quang)) - canh manh cua chong ((cong tan) OR (cong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chinh sach) OR (hieu quang)) - canh manh cua chong ((cong tan) OR (cong thanh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chinh sach) or (hieu quang)) - canh manh cua chong ((cong tan) OR (cong thanh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (hieu quang)) - canh manh cua chong ((cong tan) OR (cong thanh)) toan ban*.