Perhaps you should try some spelling variations:
dang xay » dang van, van xay
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
lang xa » lang ha, lang van
cua tre » cuu tre, cua triet, dua tren
hanh de » hanh ve, hanh kem
te bai » te bao, te tai, te ban
va cam » va cham, va cac, va cao
bai ky » ban ky, sai ky, bac ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te bai ky ((lang xa) or (dang xay)) hoi. hieu va cam xuc van hanh de ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te bai ky ((lang xa) OR (dang xay)) hoi. hieu va cam xuc van hanh de ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te bai ky ((lang xa) or (dang xay)) hoi. hieu va cam xuc van hanh de ((cua tre) or (cua te))*.