Perhaps you should try some spelling variations:
doanh khoai » doanh ngoai, doanh hoan
chau thuong » chan thuong, chap thuong, khau thuong
thuc doanh » thuc hanh, thuc dan, chuc danh
doanh khoa » toan khoa
phan xuong » phan cong
khoai chau » khoa chau, khoa phau, hai chau
khoa phan » hoa phan, khoa than, khoa phau
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
sach tam » sach tham, sach tai, sach bai
tam thuc » tham thuc, am thuc, nam thuc
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 dao thuc doanh khoa phan xuong ) or ( tu sach tam thuc doanh khoai chau thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dao thuc doanh khoa phan xuong ) OR ( tu sach tam thuc doanh khoai chau thuong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dao thuc doanh khoa phan xuong ) or ( tu sach tam thuc doanh khoai chau thuong ))*.