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, anh hoc
cuu long » cuu cong, cuu nang
cuu tong » cuu cong, cuu tinh, huu tung
khoa hoc » hoa hoc
te mach » ke mach, te sach, tim mach
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma

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 ((cuu long) or (cuu tong)) hoc doanh khoa hoc xa hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te mach hoc tap, nghien ((cuu long) OR (cuu tong)) hoc doanh khoa hoc xa hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien ((cuu long) or (cuu tong)) hoc doanh khoa hoc xa hoi va nhan va*.