Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap phong » hai phong, phap phan
truc thuoc » tri thuoc, tu thuoc
thuy thong » thuy hong, huy thong, thuy trong
cach thuc » anh thuc, cac thu
thuc thuc » hoc thuc
sach truc » sach tren, sach thu, sach thue
thuoc ban » thuoc tan, thuoc dang, thu ban
khoa thuy » khoa thu, khoi thuy, khoa thuoc
thu cach » thuc cach, thu canh, tu cach
thuc cac » thuc cach, tuc cac, phuc cac
ban khoa » san khoa, van khoa, ba khoa
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu cach thuc thuc cac khoan phap phong ) or ( tu sach truc thuoc ban khoa thuy thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu cach thuc thuc cac khoan phap phong ) OR ( tu sach truc thuoc ban khoa thuy thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu cach thuc thuc cac khoan phap phong ) or ( tu sach truc thuoc ban khoa thuy thong ))*.