Perhaps you should try some spelling variations:
thuoc bach » thuoc sach, thuoc ban, truc bach
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
pho thong » he thong
nam thuoc » nam thuc, nam thu, nha thuoc
khoa khoi » khoa hoi, khoa khoa, thoat khoi
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa phu, khoa khoa, khoa phau
sach nam » sach nay, sach nang, sach ngan
te sach » toc sach
tu sach » thu sach, su sach, tu cach
khong » phong

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