Perhaps you should try some spelling variations:
"modelo string matching algorithms complex" » "modelo string matching algorithm complex" (Expand search), "modelo string mining algorithms complex" (Expand search), "modelo string tracking algorithms complex" (Expand search), "modelo string matching algorithms complexity" (Expand search), "modelo string matching algorithm complexity" (Expand search), "modelo string matching algorithms combined" (Expand search), "modelos string matching algorithms complex" (Expand search), "modelo eyring matching algorithms complex" (Expand search), "model strings matching algorithms complex" (Expand search)
"api pitons python python programming" » "api pitons pythons python programming" (Expand search), "api pitons piton python programming" (Expand search), "api pitons pytm python programming" (Expand search), "api citons python python programming" (Expand search), "api pitoni python python programming" (Expand search), "api pitoes python python programming" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modelo string matching algorithms complex") OR ("api pitons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modelo string matching algorithms complex\") OR (\"api pitons python python programming\"))".
• Removing quotes may allow a broader search: (( modelo string matching algorithms complex ) OR ( api pitons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("modelo string matching algorithms complex") OR ("api pitons python python programming"))*.