Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vat dung » van dung, va dung, viet dung
dang xa » dang xay, dang ha, dang va
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
dung co » dung cho, dung cong, dung cua
so sac » so sach, so dac
ve dam » ven dam, ke dam, va dam
tu vat » tu va, tu van, tu bat
dam tu » nam tu, cam tu, tam tu
sac ky » cac ky, sai ky
cua te » cua tu

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: so sac ky ((dang xa) OR (lang xa)) hoi. hieu ve dam tu vat dung co ((cua triet) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky ((dang xa) OR (lang xa)) hoi. hieu ve dam tu vat dung co ((cua triet) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: so sac ky ((dang xa) OR (lang xa)) hoi. hieu ve dam tu vat dung co ((cua triet) or (cua te))*.