Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi quy cong snippets" » "doi qua cong snippets", "doi quy long snippets", "doi quyen cong snippets", "dot quy cong snippets", "doi duy cong snippets", "noi quy cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("doi quy cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi quy cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi quy cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi quy cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.