Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach doi » sach hoi, sach moi, sach dao
khoa hoc » hoa hoc
te sach » toc sach
doi dap » hoi dap, doi dau, do dap
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, va phan, va nha
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: te sach doi dap, nghien cuu mon hoc nganh khoa hoc ma hoi ((va nhan) or (ca nhan)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi dap, nghien cuu mon hoc nganh khoa hoc ma hoi ((va nhan) OR (ca nhan)) dan.
• Adding a wildcard symbol may retrieve word variants: te sach doi dap, nghien cuu mon hoc nganh khoa hoc ma hoi ((va nhan) or (ca nhan)) dan*.