Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoa doanh » toan doanh, hoa dan
phan van » pham van, thanh van, luan van
cho phan » co phan, hoc phan, hoa phan
khoa hoc » hoa hoc
cong hoa » dong hoa, dong hoc, hang hoa
cuu cong » cua cong, thu cong, cac cong
hoi tai » hoc tai, hoi trac
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi cho » hoi chu, hoi co, hoc cho
hoi tap » hoi dap, hoc tap, hai tap
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: te sach ((hoi tap) OR (hoi tai)), nghien cuu cong hoa doanh khoa hoc mai hoi cho phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((hoi tap) OR (hoi tai)), nghien cuu cong hoa doanh khoa hoc mai hoi cho phan van".
• Adding a wildcard symbol may retrieve word variants: te sach ((hoi tap) OR (hoi tai)), nghien cuu cong hoa doanh khoa hoc mai hoi cho phan van*.