Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cuu thong » cuu thuong, cuu tong, cuu chong
thong hoc » thuong hoc, tuong hoc, thong hoa
hoc doanh » hoa doanh, hoc danh, hoc dan
kon mach » ke mach, ban mach
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
so mach » so sach, tao mach
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) OR (kon mach)) hoc tap, nghien cuu thong hoc doanh khoa hoc ma hoi va nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so mach) OR (kon mach)) hoc tap, nghien cuu thong hoc doanh khoa hoc ma hoi va nhan tai".
• Adding a wildcard symbol may retrieve word variants: ((so mach) OR (kon mach)) hoc tap, nghien cuu thong hoc doanh khoa hoc ma hoi va nhan tai*.