Perhaps you should try some spelling variations:
truc doanh » tri doanh, trai doanh, muc doanh
doanh khoa » toan khoa
khoan phan » khoan phai, khoan thanh, hoa phan
dung truc » dung tru, dung thuoc, dung trung
pho thong » he thong
cach thuc » anh thuc, cac thu
thuc truc » thuc thuc, hoc truc, thuoc tru
phan tong » phan trong, phan cong, han tong
khoa pho » khoa phu, khoa khoa, khoa phau
truc cac » tuc cac, truc cau, truoc cach
su sach » so sach, vu sach
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach dung truc doanh khoa pho thong ) or ( tu cach thuc truc cac khoan phan tong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach dung truc doanh khoa pho thong ) OR ( tu cach thuc truc cac khoan phan tong ))*.