Perhaps you should try some spelling variations:
doanh khoa » toan khoa
mach hoc » cach hoc, dich hoc, anh hoc
cong hoc » dong hoc, cong coc, cong ho
cong hoa » dong hoa, dong hoc, hang hoa
khoa hoc » hoa hoc
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
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) OR (cong hoa)) doanh khoa hoc mai hoi va luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tim mach hoc tap, nghien cuu ((cong hoc) OR (cong hoa)) doanh khoa hoc mai hoi va luan van".
• Adding a wildcard symbol may retrieve word variants: tim mach hoc tap, nghien cuu ((cong hoc) OR (cong hoa)) doanh khoa hoc mai hoi va luan van*.