Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
bach tren » sach tren, sach tien, bich tran
tren thuc » trien thuc, tron thuc, trinh thuc
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa kham » kho khan, khoa than
thu thuoc » tu thuoc, thu thuc, tru thuoc
thuoc ban » thuoc tan, thuoc dang, thu ban
khoa phap » khoa phau, khoan phai, khong phap
sach thu » sach thue, sach thieu, sach tham
ban khoa » san khoa, van khoa, ba khoa
te sach » toc sach

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu bach tren thuc hang khoa kham thong ) OR ( te sach thu thuoc ban khoa phap tieng ))~.
• Adding a wildcard symbol may retrieve word variants: (( vu bach tren thuc hang khoa kham thong ) or ( te sach thu thuoc ban khoa phap tieng ))*.