Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh khoa
nganh nong » nganh cong
mach hoc » cach hoc, dich hoc, anh hoc
nhan van » nhan dan, nhan va, phan van
tu mach » tu cach, tu manh, tu hach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
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: tu mach hoc tap, nghien cuu mon hoc ((nganh khong) or (nganh nong)) hoc mai hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu mon hoc ((nganh khong) OR (nganh nong)) hoc mai hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu mon hoc ((nganh khong) or (nganh nong)) hoc mai hoi va nhan van*.