Perhaps you should try some spelling variations:
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
va xay » va xac
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
cua te » cua tu
ky va » ly va, ke va, my va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky va xay hoi. hieu ve cac luc va hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky va xay hoi. hieu ve cac luc va hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu san ky va xay hoi. hieu ve cac luc va hanh vi ((cua tre) or (cua te))*.