Perhaps you should try some spelling variations:
khen thuong » phan thuong, han thuong, thong thuong
thuong ban » thuong han, thuong lan, tuong ban
chau phong » hai phong, phap phong
phan cong » thanh cong
khoa phan » hoa phan, khoa than, khoa phau
sach khen » sach khuyen, sach han, sach kem
khoa chau » khoai chau, khoa phau, khoa cham
sach tai » sach bai, sach tham, sach dao
cac khoa » cac khoan, cac khoi, dac khoa
ban khoa » san khoa, van khoa, ba khoa
so sach » so sanh, bo sach, co sach
tai hoc » thai hoc, dai hoc, bai 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: (( so sach tai hoc cac khoa phan cong ) or ( so sach khen thuong ban khoa chau phong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach tai hoc cac khoa phan cong ) OR ( so sach khen thuong ban khoa chau phong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach tai hoc cac khoa phan cong ) or ( so sach khen thuong ban khoa chau phong ))*.