Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
lang xa » lang ha, lang van
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
te sac » te sach, te cac, te san

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

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