Perhaps you should try some spelling variations:
thong minh » hoang minh
bai thong » bai trong, ban thong, tai thuong
co thong » bo thong, co trong, co phong
sach cha » sach nha, sach che, sach cua
giai bai » gia ba
sach ha » sach nha, sach han, bach ha
sach xa » sach dao, sach nha, sach bai
me giai » de giai, ve giai, ke giai
giai co » giai cao, gian co, gioi co
so sach » so sanh, bo sach, co sach
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu ((sach ha) OR (sach xa)) me giai co thong minh ) or ( so sach cha me giai bai thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu ((sach ha) OR (sach xa)) me giai co thong minh ) OR ( so sach cha me giai bai thong tin )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( vu ((sach ha) OR (sach xa)) me giai co thong minh ) or ( so sach cha me giai bai thong tin ))".
• Adding a wildcard symbol may retrieve word variants: (( vu ((sach ha) OR (sach xa)) me giai co thong minh ) or ( so sach cha me giai bai thong tin ))*.