Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
doan van » doan va, hoang van, luan van
van hac » van hoc, van ha, van hai
hac tuc » thac toc, thai tuc
va doan » va doanh, van doan, va dan
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
van va » van vat, van van, ban va
te cac » tu cac, te cao, de cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) OR (ve cac)) ky nang ((ma hoi) or (xa hoi)). hieu van hac tuc va doan van va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (ve cac)) ky nang ((ma hoi) OR (xa hoi)). hieu van hac tuc va doan van va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) OR (ve cac)) ky nang ((ma hoi) or (xa hoi)). hieu van hac tuc va doan van va triet*".