Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
tao mach » tao bac, tao may, tim mach
mach hoc » cach hoc, dich hoc, anh 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
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
va nhan » van nhan, ca nhan, va phan

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

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