Perhaps you should try some spelling variations:
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky nang x hoi. hieu ((ve cam) or (va cam)) luc ((va danh) OR (va hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky nang x hoi. hieu ((ve cam) OR (va cam)) luc ((va danh) OR (va hanh)) dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky nang x hoi. hieu ((ve cam) or (va cam)) luc ((va danh) OR (va hanh)) dai cua tre*".