Perhaps you should try some spelling variations:
khoan phan » khoan phai, khoan thanh, hoa phan
thuoc sach » hoc sach, nuoc sach, thuat sach
kham thong » khap thong, khau thong, pham thuong
phan cong » thanh cong
nha thuoc » nha nuoc, nhan thuc, nha hoc
sach khoa » bach khoa, anh khoa, sinh khoa
khoa kham » kho khan, khoa than
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc cac » thuc cach, tuc cac, phuc cac
su sach » so sach, vu sach

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 dao thuc cac khoan phan cong ) or ( su sach nha thuoc sach khoa kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach dao thuc cac khoan phan cong ) OR ( su sach nha thuoc sach khoa kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach dao thuc cac khoan phan cong ) or ( su sach nha thuoc sach khoa kham thong ))*.