Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
phan tan » phan tap, phan lan, pha tan
phan van » pham van, thanh van, luan van
ban hoc » bang hoc, van hoc, bai hoc
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: thu mach hoc tap, nghien cua ban hoc doanh khoa hoc xa hoi va ((phan tan) OR (phan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu mach hoc tap, nghien cua ban hoc doanh khoa hoc xa hoi va ((phan tan) OR (phan van))".
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien cua ban hoc doanh khoa hoc xa hoi va ((phan tan) OR (phan van))*.