Perhaps you should try some spelling variations:
phap chong » phap phong, phap cong, pham hong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
hoc thong » hoc thuong, hoc trong, hoc hong
sach thai » sach tham, sac thai, sach tai
thai thuc » thai thuy, thai tuc, tham thuc
khoa phap » khoa phau, khoan phai, khong phap
sanh tam » canh tam, hanh tam, sang tam
tam thuc » tham thuc, am thuc, nam thuc
khoa hoc » hoa hoc
so sanh » do sanh
so sach » bo sach, co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh tam thuc cach khoa hoc thong ) or ( so sach thai thuc cach khoa phap chong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tam thuc cach khoa hoc thong ) OR ( so sach thai thuc cach khoa phap chong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tam thuc cach khoa hoc thong ) or ( so sach thai thuc cach khoa phap chong ))*.