Perhaps you should try some spelling variations:
doanh hoa » doanh khoa, doanh hoan, danh hoa
cach hoc » cach thuc, cach thoi, dich hoc
cuu dong » cuu cong, cuu tong, cuu long
co doanh » cho doanh, cao doanh, so doanh
phan van » pham van, thanh van, luan van
nhan tai » hang tai, van tai, toan tai
tu cach » tu cac
hoc xa » hoc ma
xa va » xua va, xa van, ca va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach hoc tap, nghien cuu dong co doanh hoa hoc xa va van ((phan van) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien cuu dong co doanh hoa hoc xa va van ((phan van) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu dong co doanh hoa hoc xa va van ((phan van) or (nhan tai))*.