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 cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
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 cac 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 cac xuc ((van hanh) OR (ban hanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te van ky ((nang xa) OR (nang ma)) hoi. hieu van cac 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 cac xuc ((van hanh) or (ban hanh)) vi cua tre*.