Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam lao » ca lao, cam lam, cam lo
hieu ve » hieu va
dan ky » van ky
lao va » tao va, cao va, bao va
di cua » dai cua, doi cua, de cua
tu dan » tuc dan, tu ban, cu dan
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 ve) OR (hieu van)) cam lao va hanh ((vai cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang x hoi. ((hieu ve) OR (hieu van)) cam lao va hanh ((vai cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky nang x hoi. ((hieu ve) OR (hieu van)) cam lao va hanh ((vai cua) or (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang x hoi. ((hieu ve) OR (hieu van)) cam lao va hanh ((vai cua) or (di cua)) triet*.