Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van bac » van ban, van bao, van hac
cua tre » cua te, cuu tre, cua triet
te van » le van, te va, ve van
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te van ky ((nang xa) or (nang ma)) hoi. hieu van bac xuc ((van hanh) or (ban hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te van ky ((nang xa) OR (nang ma)) hoi. hieu van bac xuc ((van hanh) OR (ban hanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te van ky ((nang xa) or (nang ma)) hoi. hieu van bac xuc ((van hanh) or (ban hanh)) vi cua tre*.