Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nhan tao » nhan tai, nhan dan
van nhan » van phan, van thanh, danh nhan
vung hoc » dung hoc, vung moc, trung hoc
mach hoc » cach hoc, dich hoc, anh hoc
cung hoc » chung hoc, dung hoc, ung hoc
hoa phan » hoa dan, co phan
cong hoa » dong hoa, dong hoc, hang hoa
cac cong » cua cong
mai hoi » mai khoi, dai hoi, lai hoi
hoi van » hoi va, hoi dan, hai van
tu mach » tu cach, tu manh, tu hach

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cac cong hoa phan ((cung hoc) OR (vung hoc)) mai hoi van nhan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cac cong hoa phan ((cung hoc) OR (vung hoc)) mai hoi van nhan tao".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cac cong hoa phan ((cung hoc) OR (vung hoc)) mai hoi van nhan tao*.