Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
khai thong » khai thuong, khap thong, khau thong
bach khoa » anh khoa
khoa phap » khoa phau, khoan phai, khong phap
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
sach tai » sach bai, sach dao, sach xa
tai truc » dai truc, thi truc, tai trung
cach dan » cac dan, bach dan, cach van
dan khai » dang khai, van khai, dang khoi
te sach » toc sach

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

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