Perhaps you should try some spelling variations:
than thong » than thuong, toan thong, tran thong
hanh khoa » hang khoa, hanh hoa, han khoa
khoa phan » hoa phan, khoa phau, khoan phai
phan cong » thanh cong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
khoa than » khoa luan, hoa thai, hoa tan
dan thuc » dan toc, am thuc
thuc anh » thuy anh, thu anh, thuc thanh
anh khoa » doanh khoa, hang khoa
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 cac dan thuc hanh khoa phan cong ) or ( te sach tham thuc anh khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac dan thuc hanh khoa phan cong ) OR ( te sach tham thuc anh khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cac dan thuc hanh khoa phan cong ) or ( te sach tham thuc anh khoa than thong ))*.