Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
cua tre » cua te, cua triet, dua tren
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo
y lang » o lang, _ lang, tay lang
cam tu » cam thu, nam tu, dam tu
tu van » tu 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 sach y lang xa hoi. ((hieu ve) or (hieu van)) cam tu van hanh vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. ((hieu ve) OR (hieu van)) cam tu van hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang xa hoi. ((hieu ve) or (hieu van)) cam tu van hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. ((hieu ve) or (hieu van)) cam tu van hanh vi ((cua tre) OR (cuu tre))*.