Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, phap tieng
thuoc sach » hoc sach, nuoc sach, thuat sach
thuoc cac » thuoc cuc, thuoc cao, thuoc dac
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
pho thong » he thong
tu thuoc » truc thuoc, tu thuong, cua thuoc
thuc con » thuc co, thuc can, thuoc cong
con khoa » von khoa, toan khoa, cuu khoa
khoa pho » khoa phu, khoa khoa, khoa phau
te sach » toc sach
sach tu » sach thu, cach tu, sach ty

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