Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
vien cac » vien bach, vien dai, vien da
nong do » dong do, nang doc, dong dao
xa nong » xa dong, xuat nong, may nong
sach ky » sac ky, sach y, sach kem
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
tac xa » tuc xa, tac da
do cua » doi cua, co cua, de cua
ve cac » va cac

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) lang xa hoi. hieu ((ve cac) OR (vien cac)) tac xa nong do cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) lang xa hoi. hieu ((ve cac) or (vien cac)) tac xa nong do cua viet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) lang xa hoi. hieu ((ve cac) or (vien cac)) tac xa nong do cua viet*.