Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nganh » hoc nhanh
thu sach » thuat sach, thuoc sach, thu hoach
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan dan » phan dau, gian dan, nhan tai
tu sach » su sach, te sach, tu cach
huu mon » huu son, hau mon, huu mot
mon hoc » toan hoc, dong hoc
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 sach) or (thu sach)) hoc tap, nghien huu mon hoc nganh khong thuoc xa hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) hoc tap, nghien huu mon hoc nganh khong thuoc xa hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) hoc tap, nghien huu mon hoc nganh khong thuoc xa hoi va nhan dan*.