Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc nganh » hoc nhanh
chong doc » chong dich, chon loc, cuong do
sach doi » sach hoi, sach moi, sach dao
hong duc » dang duc, ton duc
van nhan » van phan, van thanh, danh nhan
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
ban hoc » bang hoc, van hoc, bai hoc
hoi van » hoi va, hoi dan, hai van
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 ban hoc nganh ((chong doc) or (hong duc)) xa hoi van nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tap, nghien cua ban hoc nganh ((chong doc) OR (hong duc)) xa hoi van nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cua ban hoc nganh ((chong doc) or (hong duc)) xa hoi van nhan va*.