Perhaps you should try some spelling variations:
dao tuc » dao duc
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cao tuc » cao duc, cao suc, cao toc
tu can » tu ban, tu cac, thu canh
vi cua » vai cua, di cua
can ky » van ky, dan ky, ban ky
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang ((ma hoi) OR (mai hoi)). hieu va ((cao tuc) or (dao tuc)) va dinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang ((ma hoi) OR (mai hoi)). hieu va ((cao tuc) OR (dao tuc)) va dinh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang ((ma hoi) OR (mai hoi)). hieu va ((cao tuc) or (dao tuc)) va dinh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ((ma hoi) OR (mai hoi)). hieu va ((cao tuc) or (dao tuc)) va dinh vi cua te*.