Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
tuc ca » tuc cac, tuc cua, tuc co
va cua » va chua, via cua, ca cua
cua te » cua tu
do va » do van, so va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang xa hoi. hieu va cac ((tuc ca) OR (tuc xa)) do va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang xa hoi. hieu va cac ((tuc ca) OR (tuc xa)) do va cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xa hoi. hieu va cac ((tuc ca) OR (tuc xa)) do va cua te*.