Perhaps you should try some spelling variations:
dung cong » dung trong
cong cua » cong cu, dong cua, huong cua
vat dung » van dung, va dung, viet dung
cua tre » cua te, cuu tre, cua triet
dang xa » dang xay, lang xa, dang ha
tu vat » tu va, tu van, tu bat
ve cac » va cac, vien cac
sac ky » sai ky
ve cam » ve cham, va cam, ve cai

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) or (cac ky)) dang xa hoi. hieu ((ve cam) or (ve cac)) tu vat dung cong cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sac ky) OR (cac ky)) dang xa hoi. hieu ((ve cam) OR (ve cac)) tu vat dung cong cua tre.
• Adding a wildcard symbol may retrieve word variants: so ((sac ky) or (cac ky)) dang xa hoi. hieu ((ve cam) or (ve cac)) tu vat dung cong cua tre*.