Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
khau thong » khau thuong, khap thong, khau tong
phap thong » phap phong, phap chong, pho thong
khoa khau » khoa kham, khoa phau, khoa chau
tri thuoc » tri thuc, tri hoc, tin thuoc
thuoc cac » thuoc cuc, thuoc cao, thuoc dac
sach tam » sach tham, sach tai, sach dao
tam thuc » tham thuc, am thuc, nam thuc
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoi, dac khoa, cao khoa
su sach » so sach, vu sach
cac tri » cac tro, cac toi, cac thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach tam thuc cac khoa khau thong ) or ( tu cac tri thuoc cac khoan phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tam thuc cac khoa khau thong ) OR ( tu cac tri thuoc cac khoan phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tam thuc cac khoa khau thong ) or ( tu cac tri thuoc cac khoan phap thong ))*.