Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach tong » sach song, sach rong, sach thuong
hoc nganh » hoc nhanh
tong tap » tuong tac, trong tan, cong tac
khoa hoc » hoa hoc
van phan » van phong, van thanh, luan phan
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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 tong tap, nghien cuu mon hoc nganh khoa hoc xa hoi ((va nhan) or (van phan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tong tap, nghien cuu mon hoc nganh khoa hoc xa hoi ((va nhan) OR (van phan)) van.
• Adding a wildcard symbol may retrieve word variants: tu sach tong tap, nghien cuu mon hoc nganh khoa hoc xa hoi ((va nhan) or (van phan)) van*.