Perhaps you should try some spelling variations:
doanh khoa » toan khoa
coc doanh » cac doanh, hoa doanh, cho doanh
sach doi » sach hoi, sach moi, sach dao
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
hoc bai » hoc dai, hoc giai
bai hoi » bai choi, bai hoc, dai hoi
va phan » van phan, va phap, hoa phan

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 doi tap, nghien cuu cong coc doanh khoa hoc bai hoi ((va phan) or (va phat)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi tap, nghien cuu cong coc doanh khoa hoc bai hoi ((va phan) OR (va phat)) van.
• Adding a wildcard symbol may retrieve word variants: te sach doi tap, nghien cuu cong coc doanh khoa hoc bai hoi ((va phan) or (va phat)) van*.