Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
sach nham » sach nha, sach tham, sach han
nham thuc » nhan thuc, nam thuc, nham thu
hanh khoa » hang khoa, hanh hoa, han khoa
thu thong » thuy thong, thu thang, thu tuong
khoa phau » hoa phan, khoa kham, khoa than
khoa thu » khoa than, hoai thu, ho thu
canh tam » canh tac, canh tay, hanh tam
tam thuc » tham thuc, am thuc, nam thuc
thuc anh » thuy anh, thu anh, thuc thanh
anh khoa » doanh khoa, hang khoa
so sach » so sanh, bo sach, co sach
so canh » so sanh, bo canh, so danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach nham thuc hanh khoa thu thong ) or ( so canh tam thuc anh khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach nham thuc hanh khoa thu thong ) OR ( so canh tam thuc anh khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach nham thuc hanh khoa thu thong ) or ( so canh tam thuc anh khoa phau thong ))*.