Perhaps you should try some spelling variations:
cua tre » cua te, cua triet, dua tren
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
soc va » hoc va, loc va, doc va
ke san » ke dan
va dao » ca dao
san ky » sang ky, van ky, dan ky
va dan » ca dan, va dau, va dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ke san ky lang xa hoi. hieu ((va dan) OR (va dao)) soc va hanh vi ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ke san ky lang xa hoi. hieu ((va dan) OR (va dao)) soc va hanh vi ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ke san ky lang xa hoi. hieu ((va dan) OR (va dao)) soc va hanh vi ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: ke san ky lang xa hoi. hieu ((va dan) OR (va dao)) soc va hanh vi ((cuu tre) or (cua tre))*.