Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so dung » su dung, hoc dung, noi dung
dung ky » mung ky, vung ky, dung may
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc cac » xuc tac, tuc cac, xuc cam
dat cua » dai cua, day cua, dan cua
mat cua » ma cua, manh cua, mang cua
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so dung ky nang ((ma hoi) or (xa hoi)). hieu van cac xuc cac dan ((dat cua) or (mat cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so dung ky nang ((ma hoi) OR (xa hoi)). hieu van cac xuc cac dan ((dat cua) OR (mat cua)) tu.
• Adding a wildcard symbol may retrieve word variants: so dung ky nang ((ma hoi) or (xa hoi)). hieu van cac xuc cac dan ((dat cua) or (mat cua)) tu*.