Perhaps you should try some spelling variations:
than thong » than thuong, toan thong, tran thong
thu thuoc » tu thuoc, thu thuc, tru thuoc
thu thong » thuy thong, thu thang, thu tuong
thuoc dac » thuoc dang, thuoc sach, thuc dan
khoa than » khoa luan, hoa thai, hoa tan
sanh tri » thanh tri, dinh tri, minh tri
tri thuc » tri tue
thuc dai » thuc dan, thuc day, thuc tai
dai khoa » da khoa, tai khoa, dai hoa
khoa thu » hoai thu, ho thu
sanh thu » sach thu, san thu, doanh thu
dac khoa » da khoa, dau khoa, cac khoan
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh tri thuc dai khoa thu thong ) or ( so sanh thu thuoc dac khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tri thuc dai khoa thu thong ) OR ( so sanh thu thuoc dac khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tri thuc dai khoa thu thong ) or ( so sanh thu thuoc dac khoa than thong ))*.