Perhaps you should try some spelling variations:
cuc doanh » cac doanh, cua doanh, muc doanh
doanh hoa » doanh khoa, doanh hoan, danh hoa
danh nhan » doanh nhan, thanh nhan, benh nhan
cuu cong » cua cong, thu cong, cac cong
cong cuc » cong chuc, cong cuoc, cong cu
dan nhan » dan chan, van nhan, ban nhan
tu sinh » thu sinh, tuc sinh, tu minh
hoc xa » hoc ma
xa hoa » xa khoa, xa hoi, ma hoa

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sinh hoc tap, nghien cuu cong cuc doanh hoa hoc xa hoa ((dan nhan) OR (danh nhan)) va~".
• Adding a wildcard symbol may retrieve word variants: tu sinh hoc tap, nghien cuu cong cuc doanh hoa hoc xa hoa ((dan nhan) OR (danh nhan)) va*.