也许你应该尝试一些拼写变化:
informal introduction » animal introduction, historical introduction, general introduction
introduction case » introduction ch, introduction chap, introduction chapter
array probing » arrays probing, assay probing, array profiling
case density » clause density, based density, scale density
array arcing » array forming, array sharing, array using
array string » array strong, arrays strings, array sharing

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

• Performing a fuzzy search may retrieve terms with similar spellings: informal introduction case density ((((array arcing) or (array probing))) or (array string))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: informal introduction case density ((((array arcing) OR (array probing))) OR (array string)).
• Adding a wildcard symbol may retrieve word variants: informal introduction case density ((((array arcing) or (array probing))) or (array string))*.