Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc nganh » hoc nhanh
thong hoc » thuong hoc, tuong hoc, thong hoa
sach doi » sach hoi, sach moi, sach dao
cong hoc » dong hoc, cong hoa, cong coc
tuong ho » tong hop
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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 doi tap, nghien cua cong hoc nganh ((thong hoc) or (tuong ho)) xa hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tap, nghien cua cong hoc nganh ((thong hoc) OR (tuong ho)) xa hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cua cong hoc nganh ((thong hoc) or (tuong ho)) xa hoi va nhan va*.