Perhaps you should try some spelling variations:
phap chong » phap phong, phap cong, pham hong
khang khoa » hang khoa, khang kho, khong khoa
thuc dung » thuoc dung, thuy dung, tuc dung
dung khoa » dung cho
hoc thong » hoc thuong, hoc trong, hoc hong
nha thuoc » nha nuoc, nhan thuc, nha hoc
khoa phap » khoa phau, khoan phai, khong phap
sach han » sach tham, sach danh, sach nang
han thuc » nhan thuc, phan thuc, dan thuc
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 han thuc dung khoa hoc thong ) or ( tu sach nha thuoc khang khoa phap chong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach han thuc dung khoa hoc thong ) OR ( tu sach nha thuoc khang khoa phap chong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach han thuc dung khoa hoc thong ) or ( tu sach nha thuoc khang khoa phap chong ))*.