Perhaps you should try some spelling variations:
communication second » communications second, communication section, communication sound
tree dimensional » three dimensional, three dimentional, three dimensionally
sample spaces » sample space, sample speeches, sample sizes
scaled space » scale space, shared space, scale spaces
second tree » second green, second tier, second time
type spaces » state spaces

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication second tree dimensional ((((sample spaces) or (type spaces))) or (scaled space))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication second tree dimensional ((((sample spaces) OR (type spaces))) OR (scaled space)).
• Adding a wildcard symbol may retrieve word variants: communication second tree dimensional ((((sample spaces) or (type spaces))) or (scaled space))*.