Perhaps you should try some spelling variations:
"preliminary construction" » "preliminary consideration", "preliminary introduction", "preliminary observation"
"preliminary conversation" » "preliminary consideration", "preliminary observation", "preliminary considerations"
"imaginary conversations" » "imaginary conversion", "imaginary conventions"

Try widening your search to All Fields.

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: (((("imaginary conversation") OR ((("preliminary conversation") OR ("preliminary construction"))))) OR ("imaginary conversations")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"imaginary conversation\") or (((\"preliminary conversation\") OR (\"preliminary construction\"))))) or (\"imaginary conversations\"))".
• Removing quotes may allow a broader search: (((( imaginary conversation ) or ((( preliminary conversation ) OR ( preliminary construction ))))) or ( imaginary conversations )).
• Adding a wildcard symbol may retrieve word variants: (((("imaginary conversation") or ((("preliminary conversation") OR ("preliminary construction"))))) or ("imaginary conversations"))*.