Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
lang ha » long ha
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
di cua » dai cua, doi cua, de cua
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 ((((nang xa) or (nang x))) or (lang ha)) hoi. hieu ve cam luc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((((nang xa) OR (nang x))) OR (lang ha)) hoi. hieu ve cam luc van hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((((nang xa) or (nang x))) or (lang ha)) hoi. hieu ve cam luc van hanh di cua tre*.