Perhaps you should try some spelling variations:
vat dung » van dung, va dung, viet dung
hieu van » hieu va, thien van, lieu va
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va
cua tre » cuu tre, cua triet, dua tren
dung co » dung cho, dung cong, dung cua
so sac » so sach, so dac
tu vat » tu va, tu van, tu bat
cam tu » cam thu, nam tu, dam tu
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky dang xa hoi. ((hieu ve) OR (hieu van)) cam tu vat dung co ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky dang xa hoi. ((hieu ve) OR (hieu van)) cam tu vat dung co ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky dang xa hoi. ((hieu ve) OR (hieu van)) cam tu vat dung co ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sac ky dang xa hoi. ((hieu ve) OR (hieu van)) cam tu vat dung co ((cua tre) or (cua te))*.