Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac thoi » cac toi, cac hop, cac tro
nang xa » nang x, lang xa, nang ma
cac toc » cac toi, cac nuoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
tu van » tu va
vi 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: tu van ky nang xa hoi. hieu van ((cac toc) OR (cac thoi)) va hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang xa hoi. hieu van ((cac toc) OR (cac thoi)) va hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky nang xa hoi. hieu van ((cac toc) OR (cac thoi)) va hanh ((vi cua) or (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu van ky nang xa hoi. hieu van ((cac toc) OR (cac thoi)) va hanh ((vi cua) or (vai cua)) tre*.