Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach doan » cach hoan, hach toan, cac doanh
doan khau » doan khac, doanh chau, dao khau
khau cong » khu cong, khau tong, khach cong
thuc bach » truc bach, thuoc sach, thuc hanh
bach khoa » anh khoa
khoa phap » khoa phau, khoan phai, khong phap
toc sach » hoc sach, doc sach, thuoc sach
sach tai » sach bai, sach tham, sach xa
tai thuc » thai thuc, tri thuc, dai thuc
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( toc sach tai thuc cach doan khau cong ) or ( su sach dao thuc bach khoa phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc sach tai thuc cach doan khau cong ) OR ( su sach dao thuc bach khoa phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( toc sach tai thuc cach doan khau cong ) or ( su sach dao thuc bach khoa phap thong ))*.