Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
dan khoan » dan khoa, dai khoang, toan khoan
khoan pho » khoan nhoi, khoan phai, khoan hoi
pho thong » he thong
bai thuoc » ban thuoc, bai hoc, cay thuoc
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
khoa phau » hoa phan, khoa kham, khoa than
thuc dan » thuc hanh, hoc dan, thuc vat
sach bai » sach dao, cac bai, sach xa
anh khoa » doanh khoa, hang khoa
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu thuc » tu thuoc, thu thuc, tu thu
su sach » so sach, vu sach

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