Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
thanh phan » thanh pho, thanh san, thanh toan
hoc nganh » hoc nhanh
thanh van » thanh san, thanh toan, thanh nhan
mach hoc » cach hoc, dich hoc, anh hoc
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
khoa hoc » hoa hoc
tu mach » tu cach, tu manh, tu hach
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 mach hoc tap, nghien cuu toan hoc nganh khoa hoc ma hoi va ((thanh van) or (thanh phan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu toan hoc nganh khoa hoc ma hoi va ((thanh van) OR (thanh phan)).
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu toan hoc nganh khoa hoc ma hoi va ((thanh van) or (thanh phan))*.