Perhaps you should try some spelling variations:
doanh khoan » doanh khoa, doanh hoan, doanh nhan
thai doanh » thai doan, trai doanh, thai danh
khoan nhoi » khoan hoi, khoa hoi, khoa noi
nhoi khong » khoi khong, noi khong, nho khong
sach tranh » canh tranh
khoa thong » hoa thong, thoai thong, pho thong
thuc thai » thuc pham, toc thai, thuc thuc
bach khoa » anh khoa
khoa khoa » hoa khoa, khuan khoa, khoa hoc
cac thuc » cach thuc, cac thu, can thuc
tranh vu » tran vu, tranh va, tranh cua
te sach » toc 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 cac thuc thai doanh khoan nhoi khong ) or ( te sach tranh vu bach khoa khoa thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac thuc thai doanh khoan nhoi khong ) OR ( te sach tranh vu bach khoa khoa thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cac thuc thai doanh khoan nhoi khong ) or ( te sach tranh vu bach khoa khoa thong ))*.