Perhaps you should try some spelling variations:
cuc doanh » cua doanh, muc doanh, cho doanh
cac doanh » cac dan, cac dang, van doanh
cuu dong » cuu cong, cuu tong, cuu long
dan nhan » danh nhan, dan chan, van nhan
tu sinh » thu sinh, tuc sinh, tu minh
nhan va » nhan tai, nhan dan, nhan tao
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.

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