Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
khau thong » khau thuong, khap thong, khau tong
phap thong » phap phong, phap chong, pho thong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc bich » thi bich, thu tich, thac binh
sach dai » sach dao, sach bai, sach dat
dai thuc » dan thuc, dai thu, dai thua
thuc cac » thuc cach, tuc cac, phuc cac
tu sach » thu sach, su sach, te sach
bich ha » bach ha, bich nga
ha khau » han khau, ha chau, nhap khau

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach tham thuc bich ha khau thong ) or ( tu sach dai thuc cac khoan phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tham thuc bich ha khau thong ) OR ( tu sach dai thuc cac khoan phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tham thuc bich ha khau thong ) or ( tu sach dai thuc cac khoan phap thong ))*.