Perhaps you should try some spelling variations:
time mach » tim mach, tinh mach
canh khoa » anh khoa, xanh khoa, doanh khoa
hoa doanh » toan doanh, hoa dan
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu nang
cuu tong » cuu cong, cuu tinh, huu tung
cuc canh » luc canh, suc canh, cuoc cach
khoa hoc » hoa hoc
nhan tao » nhan tai, nhan dan

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

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