Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
khong cong » thong cong, khong cang, chong cong
hua khong » hoa khong, cua khong, hoac khong
nang phap » nang phat, nang phan, ban phap
anh tang » anh bang, anh dang, anh nang
tang hua » tang ha, tang cua, tang luan
bang php » bang thep, mang phap, lang phu

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 (ho manh)) - anh tang hua khong cong ((bang php) OR (nang phap)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (ho manh)) - anh tang hua khong cong ((bang php) OR (nang phap)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (ho manh)) - anh tang hua khong cong ((bang php) OR (nang phap)) tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (ho manh)) - anh tang hua khong cong ((bang php) OR (nang phap)) tap*.