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, bac hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
anh hoc » sinh hoc, benh hoc, hinh hoc
va nhan » van nhan, ca nhan, va phan
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((mach hoc) OR (anh hoc)) tap, nghien cuu tong hoc doanh khoa hoc ma hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((mach hoc) OR (anh hoc)) tap, nghien cuu tong hoc doanh khoa hoc ma hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: so ((mach hoc) OR (anh hoc)) tap, nghien cuu tong hoc doanh khoa hoc ma hoi va nhan dan*.