Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
trung hoc » trung quoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
cung hoc » chung hoc, dung hoc, vung hoc
nhan tao » nhan tai, nhan dan
tu dich » te dich, chu dich, hut dich
va nhan » van nhan, ca nhan, va phan
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: tu dich hoc tap, nghien cac cong hoc pho ((cung hoc) or (trung hoc)) ma hoi va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dich hoc tap, nghien cac cong hoc pho ((cung hoc) OR (trung hoc)) ma hoi va nhan tao.
• Adding a wildcard symbol may retrieve word variants: tu dich hoc tap, nghien cac cong hoc pho ((cung hoc) or (trung hoc)) ma hoi va nhan tao*.