Perhaps you should try some spelling variations:
formation problem » location problem, population problem, formation process
class dimension » class dimensions, classes dimension, fast dimension
problem class » problems class, problem case, problem claude
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, 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: formation problem class dimension ((array format) or (((array string) or (array arcing))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: formation problem class dimension ((array format) OR (((array string) OR (array arcing)))).
• Adding a wildcard symbol may retrieve word variants: formation problem class dimension ((array format) or (((array string) or (array arcing))))*.