Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
van anh » van thanh, tuan anh, van minh
hieu ve » hieu va, hieu van
di cua » dai cua, doi cua, de cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve va » ve van, te va, ke va
va o » va co, va do, va mo

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)) hoi. hieu ve va o ((van hanh) or (van anh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (nang x)) hoi. hieu ve va o ((van hanh) OR (van anh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (nang x)) hoi. hieu ve va o ((van hanh) or (van anh)) di cua tre*.