Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
thai thuoc » thai thuc, thai hoc, nha thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
dan thong » dan trong, ban thong, dan phong
manh thi » anh thi, minh thi, oanh thi
thi thuc » thai thuc, thi thu, thi thuy
thuc cac » thuc cach, tuc cac, phuc cac
san thai » sac thai, ban thai, van thai
sach hoa » sach ha, sach hoi, bach hoa
tu manh » tu minh, tu hanh, vu manh
tu san » thu san, tu ban, tu can

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 manh thi thuc cac khoan phap thong ) OR ( tu san thai thuoc sach hoa dan thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( tu manh thi thuc cac khoan phap thong ) or ( tu san thai thuoc sach hoa dan thong ))*.