Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
thuc bach » truc bach, thuc cach, thuoc sach
khoa khau » khoa kham, khoa phau, khoa chau
pho thong » he thong
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa phu, khoa khoa, khoa phau
vu sach » vu bach, vu khach
sach va » sach xa, sach ha, sach nha
su sach » so sach

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 va thuc bach khoa khau thong ) or ( su sach dao thuc anh khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu sach va thuc bach khoa khau thong ) OR ( su sach dao thuc anh khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( vu sach va thuc bach khoa khau thong ) or ( su sach dao thuc anh khoa pho thong ))*.