Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
soc va » loc va, doc va, goc 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 cac ky dang xa hoi. hieu va tham ((soc va) or (hoc va)) hanh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky dang xa hoi. hieu va tham ((soc va) OR (hoc va)) hanh vi ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te cac ky dang xa hoi. hieu va tham ((soc va) or (hoc va)) hanh vi ((cua tre) or (cua viet))*.