Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien huu » nghien cuu, nguyen huu, chien huu
goc nganh » hoc nganh, hoc nhanh, cac nganh
khong hoc » khung hoc, thong hoc, khong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
phat van » pham van, phan van, phap van
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 huu) OR (nhiem huu)) mot goc nganh khong hoc ma hoi va phat van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, ((nghien huu) OR (nhiem huu)) mot goc nganh khong hoc ma hoi va phat van".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, ((nghien huu) OR (nhiem huu)) mot goc nganh khong hoc ma hoi va phat van*.