Perhaps you should try some spelling variations:
nhan khong » nhan thong, nhanh chong, nganh khong
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
thuoc xa » thuoc ma, thuoc va, thuoc tai
thuoc la » thuoc ma, thuoc va, thuoc tai
nhan tao » nhan tai, nhan dan
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
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: thu mach hoc tap, nghien cuu mot hoc nhan khong ((thuoc xa) or (thuoc la)) hoi va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu mach hoc tap, nghien cuu mot hoc nhan khong ((thuoc xa) OR (thuoc la)) hoi va nhan tao.
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien cuu mot hoc nhan khong ((thuoc xa) or (thuoc la)) hoi va nhan tao*.