Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
luong khoa » dung khoa
than thong » than thuong, toan thong, tran thong
tai thuoc » tri thuoc, bai thuoc, tac thuoc
thuoc cac » thuoc cuc, thuoc cao, thuoc dac
thu luong » thu huong, thu tuong, phu luong
khoa than » khoa luan, hoa thai, hoa tan
sach tai » sach bai, sach tham, sach dao
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
tai thu » thi thu, tai khu, tai 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 tai thuoc cac khoan phap thong ) or ( tu sach tai thu luong khoa than thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tai thuoc cac khoan phap thong ) OR ( tu sach tai thu luong khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tai thuoc cac khoan phap thong ) or ( tu sach tai thu luong khoa than thong ))*.