Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
thuoc sach » hoc sach, nuoc sach, thuat sach
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
tri thuoc » tri thuc, tri hoc, tin thuoc
phu thong » pho thong, khau thong, phan thong
thuc cac » thuc cach, tuc cac, phuc cac
khac tri » khac trai, khac thi, khac triet
su sach » so sach, vu sach
vu khac » vu kham, vu khanh, bui khac
sach ha » sach nha, sach han, sach xa
ha phu » hai phu, hoa phu, ha pha

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 tren thuc cac khoan phap thong ) or ( vu khac tri thuoc sach ha phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tren thuc cac khoan phap thong ) OR ( vu khac tri thuoc sach ha phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tren thuc cac khoan phap thong ) or ( vu khac tri thuoc sach ha phu thong ))*.