Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
gian hoa » gian ha, gian hoi, gian thua
khoa so » khoan so, khoa co, khoa hoc
so gian » so giai, so giao, so gia
va luan » vay luan, van luan, va quan
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((mach hoc) or (cach hoc)) tap, nghien cuu toan hoc doanh khoa so gian hoa va luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((mach hoc) OR (cach hoc)) tap, nghien cuu toan hoc doanh khoa so gian hoa va luan van.
• Adding a wildcard symbol may retrieve word variants: toc ((mach hoc) or (cach hoc)) tap, nghien cuu toan hoc doanh khoa so gian hoa va luan van*.