Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, lang van
sai ky » sac ky
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu cua
te sai » te tai, te bai, te lai

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

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