Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
khan thong » khap thong, khau thong, nhan thong
khoa phap » khoa phau, khoan phai, khong phap
sach tham » sach nha
sach tri » sach tai, sach tren, sach truc
dac khoa » da khoa, dai khoa, dau khoa
sach kho » bach khoa, sach dao, sach nha
kho khan » khoa kham, khoa than
tu sach » thu sach, su sach, tu cach
tri tuc » tri thuc, tri tue, tri tac
tuc dac » tuc cac, tuc dan, thuoc dac
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: (( tu sach tri tuc dac khoa phap thong ) or ( te sach tham thuoc sach kho khan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri tuc dac khoa phap thong ) OR ( te sach tham thuoc sach kho khan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri tuc dac khoa phap thong ) or ( te sach tham thuoc sach kho khan thong ))*.