Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
van luan » van quan, van tuan, von luan
su sach » vu sach
so sach » so sanh, bo sach, co sach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoi van » hoi va, hoi dan, hai van
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) hoc tap, nghien cuu mot hoc nganh hoa hoc ma hoi van luan van~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) hoc tap, nghien cuu mot hoc nganh hoa hoc ma hoi van luan van*.