Perhaps you should try some spelling variations:
tu cach » tu cac
hanh va » hang va
cam tuc » cam xuc, cam tu, nam thuc
cach tu » cach thuc
hieu va » lieu va, hieu qua
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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

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