Perhaps you should try some spelling variations:
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va dinh » van dinh, va kinh, va tinh
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu
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) OR (hieu va)) cam tuc va dinh van ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky nang x hoi. ((hieu ve) OR (hieu va)) cam tuc va dinh van ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky nang x hoi. ((hieu ve) OR (hieu va)) cam tuc va dinh van ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te san ky nang x hoi. ((hieu ve) OR (hieu va)) cam tuc va dinh van ((cua te) or (cua tu))*.