Perhaps you should try some spelling variations:
phai thong » phap thong, phai tuong, phan thong
khoan phai » khong phai, khoa phau, khoan hoi
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
nhan thong » nhan trong, nha thong, nhan khong
dac khoan » cac khoan, dac khoa, dai khoang
sach tham » sach nha
sach tri » sach tai, sach tren, sach truc
sach kho » bach khoa, sach dao, sach nha
kho nhan » kho khan, cho nhan, khi nhan
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 sach kho nhan 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 sach kho nhan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri tuc dac khoan phai thong ) or ( te sach tham thuoc sach kho nhan thong ))*.