Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
mai khoi » mai khoa, tai khoa, cac khoi
mai hoi » dai hoi, lai hoi, mai doi
va luan » vay luan, van luan, va quan
tim » time

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

• Performing a fuzzy search may retrieve terms with similar spellings: tim mach hoc tap, nghien cuu cong hoc doanh khoa hoc ((mai hoi) OR (mai khoi)) va luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tim mach hoc tap, nghien cuu cong hoc doanh khoa hoc ((mai hoi) OR (mai khoi)) va luan van".
• Adding a wildcard symbol may retrieve word variants: tim mach hoc tap, nghien cuu cong hoc doanh khoa hoc ((mai hoi) OR (mai khoi)) va luan van*.