Perhaps you should try some spelling variations:
tham thuoc » pham thuoc, tham thuc, nha thuoc
thuoc dang » thuoc dung, thuoc khang, thuc dan
phap thong » phap phong, phap chong, pho thong
sach nham » sach nha, sach han, sach ha
dung khoa » dung cho
hoc thong » hoc thuong, hoc trong, hoc hong
sach tham » sach nha
dang khoa » hang khoa, dang khoi, dong khoa
khoa phap » khoa phau, khoan phai, khong phap
nham tac » nham thuc, nham tang, pham tai
tac dung » sach dung, xay dung, tin dung
khoa hoc » hoa hoc
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: (( tu sach nham tac dung khoa hoc thong ) or ( tu sach tham thuoc dang khoa phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach nham tac dung khoa hoc thong ) OR ( tu sach tham thuoc dang khoa phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach nham tac dung khoa hoc thong ) or ( tu sach tham thuoc dang khoa phap thong ))*.