Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang va
dang ha » dong ha, dung ha, lang ha
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc ca » tuc cac, tuc cua, tuc xa
va cua » va chua, via cua, ca cua
cua te » cua tu
ca so » cao so, cay so, cua so
so va » so van, so vat, su 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) OR (dang ha)) hoi. hieu va cac tuc ca so va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((dang xa) OR (dang ha)) hoi. hieu va cac tuc ca so va cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang xa) OR (dang ha)) hoi. hieu va cac tuc ca so va cua te*.