Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
trong hoc » truong hoc, thong hoc, trong hoa
tuong hoc » truong hoc, tuong ho, duong hoc
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
so sach » so sanh, bo sach, co sach
nha dan » nhan dan, nhac dan, nha van
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: so sach hoc tap, nghien cuu ((trong hoc) or (tuong hoc)) nganh khoa hoc ma hoi dap nha dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu ((trong hoc) OR (tuong hoc)) nganh khoa hoc ma hoi dap nha dan.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu ((trong hoc) or (tuong hoc)) nganh khoa hoc ma hoi dap nha dan*.