Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
chuc doanh » chuc danh, cho doanh, cac doanh
doanh khoa » toan khoa
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa phau » hoa phan, khoa kham, khoa than
sach pham » sach tham, sach phat, sach phap
pham chuc » pham duc, pham huu, kham chua
hoc thong » hoc thuong, hoc trong, hoc hong
thu sach » tu sach, thuat sach, thuoc sach
sach tai » sach bai, sach tham, sach dao
tai thuc » thai thuc, tri thuc, dai thuc
khoa hoc » hoa hoc
so sach » so sanh, bo sach, co sach

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 tai thuc hanh khoa phau thong ) or ( so sach pham chuc doanh khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach tai thuc hanh khoa phau thong ) OR ( so sach pham chuc doanh khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach tai thuc hanh khoa phau thong ) or ( so sach pham chuc doanh khoa hoc thong ))*.