Perhaps you should try some spelling variations:
entr » entry, entra, ent
entro » entryo, entrao, ento, entry, intro, enero
entre » entrye, entrae, ente, entry
entroe » entryoe, entraoe, entoe, entrye, introe, eneroe, entrou, entropie

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((entr OR entro) OR entre) OR entroe)('act OR 'acute ).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((entr OR entro) or entre) or entroe)('act or 'acute )".
• Adding a wildcard symbol may retrieve word variants: (((entr OR entro) or entre) or entroe)('act or 'acute )*.