Perhaps you should try some spelling variations:
doanh khoan » doanh khoa, doanh hoan, doanh nhan
thuc doanh » thuc hanh, thuc dan, chuc danh
khoan phai » khong phai, khoa phau, khoan hoi
phai chong » phap chong, pham chuong, khai chuong
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach khoa » bach khoa, sach nha, anh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
hanh tai » thanh tai, hang tai, han tai
tai nuoc » tai quoc, thi nuoc, tham nuoc
khoa hoc » hoa hoc
sanh dai » sinh dai, sanh dan, vanh dai
dai thuc » dan thuc, dai thu, dai thua
so hanh » so danh, co hanh, do hanh
so sanh » do sanh

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

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