Perhaps you should try some spelling variations:
nhan khong » nhan thong, nhanh chong, nganh khong
khong hoc » khung hoc, thong hoc, khong thuoc
van thanh » ban thanh, van tuan
sach doi » sach hoi, sach moi, sach dao
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
van nhan » van phan, danh nhan, van khanh
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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