Perhaps you should try some spelling variations:
sach trien » sach tien, sach tren, sach thieu
trien thuc » trien thuoc, tren thuc, trien thuat
khan thong » khap thong, khau thong, nhan thong
than thong » than thuong, toan thong, tran thong
thuc benh » thu benh, thuc ben, thuc hanh
sach truc » cach thuc, sach tren, sach thu
truc thuc » truc thuoc, thuc thuc, truc thuy
khoa than » khoa luan, hoa thai, hoa tan
thu sach » tu sach, thuat sach, thuoc sach
benh kho » benh khong, benh phoi, benh hoc
kho khan » khoa kham
thuc anh » thuc hanh, thuy anh, thu anh
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: (( thu sach trien thuc benh kho khan thong ) or ( te sach truc thuc anh khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach trien thuc benh kho khan thong ) OR ( te sach truc thuc anh khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach trien thuc benh kho khan thong ) or ( te sach truc thuc anh khoa than thong ))*.