Perhaps you should try some spelling variations:
thuoc sinh » hoc sinh, thu sinh, thuoc sach
sinh khoan » sinh khoa, sinh hoat, dinh khoa
khoan phai » khong phai, khoan hoi, khoan nhoi
phai thong » phap thong, phai tuong, phan thong
phau thong » phap thong, khau thong, phan thong
khoa phau » hoa phan, khoa kham, khoa than
va thuoc » va thuc, va thuong, nha thuoc
cach dao » sach dao, cach bao, cach nao
cac khoa » cac khoan, cac khoi, dac khoa
su sach » so sach, vu sach
sach va » sach xa, sach ha, sach dao
tu cach » tu cac
dao hoc » dai hoc, dan hoc, day hoc
hoc cac » hoc cao

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 va thuoc sinh khoan phai thong ) or ( tu cach dao hoc cac khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach va thuoc sinh khoan phai thong ) OR ( tu cach dao hoc cac khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach va thuoc sinh khoan phai thong ) or ( tu cach dao hoc cac khoa phau thong ))*.