Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, vu kham, tu cham
nang xa » nang x, nang ma, mang xa
lai cua » dai cua, hai cua, lai chau
lang xa » lang ha, dang xay, lang van
xuc van » duc van, luc van, xuc ban
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((nang xa) or (lang xa)) hoi. hieu ((ve cam) or (vu cham)) xuc van hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cam) OR (vu cham)) xuc van hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) or (lang xa)) hoi. hieu ((ve cam) or (vu cham)) xuc van hanh lai cua tre*.