Perhaps you should try some spelling variations:
nguoi bach » nguoi sach, nguoi bac, nguoi benh
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc bach » thuoc sach, thuoc ban, truc bach
tac nguoi » toc nguoi, tay nguoi, thuc nguoi
bach khoa » anh khoa
pho thong » he thong
sach tham » sach nha
hoc thong » hoc thuong, hoc trong, hoc hong
sanh tac » canh tac, sang tac, anh ta
khoa pho » khoa phu, khoa khoa, khoa phau
khoa hoc » hoa hoc
so sanh » do sanh
tu sach » thu sach, su sach, te sach

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 tac nguoi bach khoa pho thong ) or ( tu sach tham thuoc bach khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tac nguoi bach khoa pho thong ) OR ( tu sach tham thuoc bach khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tac nguoi bach khoa pho thong ) or ( tu sach tham thuoc bach khoa hoc thong ))*.