Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
thuoc sach » hoc sach, nuoc sach, thuat sach
khau thong » khau thuong, khap thong, khau tong
sach truc » cach thuc, sach tren, sach thu
truc thuc » truc thuoc, thuc thuc, truc thuy
tai thuoc » tri thuoc, bai thuoc, tac thuoc
sach tham » sach nha
tham khau » tham khao, nhap khau, tham nhap
thuc cac » thuc cach, tuc cac, phuc cac
sach tai » sach bai, sach dao, sach xa
tu sach » thu sach, su sach, te sach

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 truc thuc cac khoan phap thong ) or ( tu sach tai thuoc sach tham khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach truc thuc cac khoan phap thong ) OR ( tu sach tai thuoc sach tham khau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach truc thuc cac khoan phap thong ) or ( tu sach tai thuoc sach tham khau thong ))*.