Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
khoan phap » khoan phai, khoa phau, han phap
thuoc cao » thuoc co, thuc cao, thuoc bao
cao khoan » cac khoan, cao khoa, tao khoang
ty thuoc » ly thuoc, tu thuoc, ty thuc
khoan he » khoa he, khoan ke, khoan le
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
vu sach » vu bach, su sach, vu khach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach ty thuoc cao khoan he thong ) or ( vu sach ty thuoc cao khoan phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach ty thuoc cao khoan he thong ) OR ( vu sach ty thuoc cao khoan phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach ty thuoc cao khoan he thong ) or ( vu sach ty thuoc cao khoan phap thong ))*.