Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
sach hoi » sach doi, sach moi, cach thoi
nhan dan » phan dau, gian dan, nhan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
xa nhan » ca nhan, va nhan, xa phan
hoa » khoa

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) or (sach hoi)) tap, nghien cuu mon hoc nganh khong hoc ma hoa xa nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (sach hoi)) tap, nghien cuu mon hoc nganh khong hoc ma hoa xa nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (sach hoi)) tap, nghien cuu mon hoc nganh khong hoc ma hoa xa nhan dan*.