Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoa doanh » toan doanh, hoa dan
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
khoa hoc » hoa hoc
phan van » thanh van, luan van, tran van
te sach » toc sach
hoi tap » hoi dap, hoc tap, hoi tai
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi cho » hoi chu, hoi co, hoc cho

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, nghien cuu cong hoa doanh khoa hoc mai hoi cho ((phan van) OR (pham van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi tap, nghien cuu cong hoa doanh khoa hoc mai hoi cho ((phan van) OR (pham van))".
• Adding a wildcard symbol may retrieve word variants: te sach hoi tap, nghien cuu cong hoa doanh khoa hoc mai hoi cho ((phan van) OR (pham van))*.