Perhaps you should try some spelling variations:
phap chong » phap phong, phap cong, pham hong
hoat thong » hoa thong, hoai thuong, thoai thong
sach pham » sach tham, sach phat, sach phap
pham thuc » phap thuc, pham chuc, nham thuc
thuc hach » thuc hanh, chuc hach, thuc cach
hach toan » thanh toan, manh toan
toan hoat » toan khoa, toan hoc, toan ho
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa phap » khoa phau, khoan phai, khong phap
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
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: (( tu sach pham thuc hach toan hoat thong ) or ( tu sach tri thuc bach khoa phap chong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach pham thuc hach toan hoat thong ) OR ( tu sach tri thuc bach khoa phap chong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach pham thuc hach toan hoat thong ) or ( tu sach tri thuc bach khoa phap chong ))*.