Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
dan thong » dan trong, ban thong, dan phong
thong hoc » thuong hoc, tuong hoc, thong hoa
thu sach » tu sach, thuat sach, thuoc sach
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan tao » nhan tai, nhan dan
te sach » toc sach
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: ((thu sach) or (te sach)) hoc tap, nghien cac cong hoa dan thong hoc xa hoi va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) hoc tap, nghien cac cong hoa dan thong hoc xa hoi va nhan tao.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) hoc tap, nghien cac cong hoa dan thong hoc xa hoi va nhan tao*.