Perhaps you should try some spelling variations:
nghiep thuc » nghiem thuc, nghiem thuoc, nghe thuc
doanh khoa » toan khoa
thuc cong » thuoc cong, thu cong, chuc cong
coc doanh » cac doanh, hoa doanh, cho doanh
sach hoc » cach hoc, sach hoi, mach hoc
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
cac pham » tac pham, cac ham, cau pham
cac phan » cac nhan, cao phan, cap phan
tu sach » thu sach, su sach, te sach
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghiep thuc cong coc doanh khoa hoc xa hoi ((cac pham) or (cac phan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghiep thuc cong coc doanh khoa hoc xa hoi ((cac pham) OR (cac phan)) van*.