Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap phong » hai phong, phap phan
phan thong » phan thuong, phan hong, phan tong
thai thuc » thai thuy, thai tuc, tham thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
hanh thi » nhanh thi, hanh thoi, anh thi
thi thuc » thi thu, thi thuy, tri thuc
thuc cac » tuc cac, phuc cac, thac cac
san thai » sac thai, ban thai, van thai
tu hanh » du hanh, lu hanh, thuc hanh
cach ha » cach pha, bach ha, sach ha
ha phan » hoa phan, hai phan, va phan
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hanh thi thuc cac khoan phap phong ) or ( tu san thai thuc cach ha phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hanh thi thuc cac khoan phap phong ) OR ( tu san thai thuc cach ha phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu hanh thi thuc cac khoan phap phong ) or ( tu san thai thuc cach ha phan thong ))*.