Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
phan hung » phan chung, phan ung, phan hong
mach hoc » cach hoc, dich hoc, anh hoc
cong coc » cong cuoc, cong co, cong uoc
cong cac » cuong cac, cong tac, cong cau
hung hoc » chung hoc, khung hoc, nhung hoc
van nhan » van phan, van thanh, danh nhan
nhan tao » nhan tai, nhan dan
tu mach » tu cach, tu manh, tu hach
hoc bai » hoc dai, hoc giai
bai hoi » bai choi, bai hoc, dai hoi
hoi van » hoi va, hoi dan, hai van

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 coc) OR (cong cac)) phan hung hoc bai hoi van nhan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cac ((cong coc) OR (cong cac)) phan hung hoc bai hoi van nhan tao*".