Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
khoan phau » khoa phau, khoan phai, khoa chau
phau thong » khau thong, phan thong, phan thuong
sach tri » sach tai, sach tren, sach truc
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
tri ve » tri le, trinh ve
ve cac » vien cac

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri va cac khoan phap thong ) OR ( su sach tri ve cac khoan phau thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri va cac khoan phap thong ) or ( su sach tri ve cac khoan phau thong ))*.