Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
doanh khoa » toan khoa
sach truc » cach thuc, sach thu, sach thue
cua doanh » luat doanh, cua dang, cua dan
khoa phap » khoa phau, khoan phai, khong phap
sach tren » sach tien, sach tranh
thi doanh » tri doanh, thi oanh, thi doan
truc cua » truc chua, thuc cua, truc cu
tren thi » trien thi, tran thi, trieu thi
he khong » he thong
tu sach » thu sach, su sach, te sach
khoa he » hoa he, khoa hoc, khong he

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 truc cua doanh khoa phap thong ) or ( tu sach tren thi doanh khoa he khong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach truc cua doanh khoa phap thong ) OR ( tu sach tren thi doanh khoa he khong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach truc cua doanh khoa phap thong ) or ( tu sach tren thi doanh khoa he khong ))*.