Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cac » van hac, van cau, van bac
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
vai cua » hai cua, lai cua, bai cua
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
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: tu dan ky nang x hoi. hieu van cac tuc ((va hanh) or (van ban)) ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang x hoi. hieu van cac tuc ((va hanh) OR (van ban)) ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang x hoi. hieu van cac tuc ((va hanh) or (van ban)) ((vai cua) or (dai cua)) tre*.