Perhaps you should try some spelling variations:
thong minh » thong tin, hoang minh
ca thong » ca thuong, va thong, ca trong
sach cha » sach nha, sach che, sach ha
co thong » bo thong, co trong, co phong
sach bac » sach bai, sach dao, sach xa
ke giai » kem giai, de giai, ke giao
giai co » giai cao, gian co, gioi co
sach ba » sach bai, sach bao, sach xa
so sach » so sanh, bo sach, co sach
giai ca » giai cac, giai cao, giai ma
cha va » chat va, chai va, cham va

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 ba) OR (sach bac)) ke giai co thong minh ) or ( so sach cha va giai ca thong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu ((sach ba) OR (sach bac)) ke giai co thong minh ) OR ( so sach cha va giai ca thong minh )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( vu ((sach ba) OR (sach bac)) ke giai co thong minh ) or ( so sach cha va giai ca thong minh ))".
• Adding a wildcard symbol may retrieve word variants: (( vu ((sach ba) OR (sach bac)) ke giai co thong minh ) or ( so sach cha va giai ca thong minh ))*.