Perhaps you should try some spelling variations:
khong minh » thong minh, hoang minh, duong minh
nguoi cong » nguoi muong, nguoi thong, nguoi nung
sach thue » sach thu, sach thieu, sach tham
nguoi con » nguoi co, nguoi cor, nuoi con
hong minh » hoang minh, thong minh, hong hinh
sach cha » sach nha, sach che, sach ha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach cha) or (sach thue)) me ((nguoi con) OR (nguoi cong)) ((hong minh) or (khong minh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach cha) OR (sach thue)) me ((nguoi con) OR (nguoi cong)) ((hong minh) OR (khong minh)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach cha) or (sach thue)) me ((nguoi con) OR (nguoi cong)) ((hong minh) or (khong minh))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach cha) or (sach thue)) me ((nguoi con) OR (nguoi cong)) ((hong minh) or (khong minh))*.