Perhaps you should try some spelling variations:
"basic projective a–modulus _" » "basic properties a–modulus _", "basic projection _–modulus _", "basic projective a–models _"
"basic properties a or properties _ –modules p" » "basic properties va or properties _ –modules p", "basic properties via or properties _ –modules p", "basic properties a or properties _ –modules _", "basic properties a or properties _ –nodules _", "basic properties a or properties _ –module 8"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("basic projective a–modulus _") or ("basic ((properties a) or (properties _))–modules p"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("basic projective a–modulus _") OR ("basic ((properties a) or (properties _))–modules p")).
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