Perhaps you should try some spelling variations:
dang xay » dang van, van xay
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
le nam » ly nam, he nam, te nam
le na » le va, le ta, le ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((nang xa) or (dang xay)) hoi. hieu ((le nam) or (le na)) thuc ban hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (dang xay)) hoi. hieu ((le nam) OR (le na)) thuc ban hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) or (dang xay)) hoi. hieu ((le nam) or (le na)) thuc ban hanh va cua tre*.