Perhaps you should try some spelling variations:
doanh khoa » toan khoa
goc doanh » hoa doanh, voi doanh, von doanh
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
tu mach » tu cach, tu manh, tu hach
cuu mot » cua mot, cuu mo, huu mot
nhan va » nhan dan, nhan tao, phan van
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

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