Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
hinh hoc » sinh hoc, tin hoc, benh hoc
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((mach hoc) or (hinh hoc)) tap, nghien huu mot hoc nganh khong hoc ma hai van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((mach hoc) OR (hinh hoc)) tap, nghien huu mot hoc nganh khong hoc ma hai van nhan tai.
• Adding a wildcard symbol may retrieve word variants: su ((mach hoc) or (hinh hoc)) tap, nghien huu mot hoc nganh khong hoc ma hai van nhan tai*.