Perhaps you should try some spelling variations:
te sach » toc sach
toc tay » toc thai
dat cua » dai cua, day cua, dan cua
mat cua » ma cua, manh cua, mang cua
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
toc ta » toc thai

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: te sach ky lang xa hoi. hieu qua cac ((toc ta) OR (toc tay)) van ((mat cua) OR (dat cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu qua cac ((toc ta) OR (toc tay)) van ((mat cua) or (dat cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu qua cac ((toc ta) OR (toc tay)) van ((mat cua) or (dat cua)) tre*.