Perhaps you should try some spelling variations:
phai thong » phap thong, phai tuong, phan thong
khoan phai » khong phai, khoan hoi, khoan nhoi
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc bach » thuoc sach, thuoc ban, truc bach
phau thong » phap thong, khau thong, phan thong
dac khoan » cac khoan, dac khoa, dai khoang
sach tham » sach nha
bach khoa » anh khoa
khoa phau » hoa phan, khoa kham, khoa than
sach tri » sach tai, sach tren, sach truc
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 khoan phai thong ) or ( te sach tham thuoc bach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri tuc dac khoan phai thong ) OR ( te sach tham thuoc bach khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri tuc dac khoan phai thong ) or ( te sach tham thuoc bach khoa phau thong ))*.