Perhaps you should try some spelling variations:
doanh thong » doanh thuong, doanh tong, doanh trong
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoa doanh » toan doanh, hoa dan
thong hoc » thuong hoc, tuong hoc, thong hoa
mach hoc » cach hoc, dich hoc, anh hoc
cua hang » cua dang, cua nhung, cua cong
hang hoa » hang khoa, thanh hoa, hang va
nhan van » nhan dan, phan van, nha van
te mach » ke mach, te sach, tim mach
nhan va » nhan tai, nhan dan, nhan tao
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: te mach hoc tap, nghien cua hang hoa doanh thong hoc ma hoi va ((nhan van) OR (nhan va))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te mach hoc tap, nghien cua hang hoa doanh thong hoc ma hoi va ((nhan van) OR (nhan va))".
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cua hang hoa doanh thong hoc ma hoi va ((nhan van) OR (nhan va))*.