Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc phan one snippets" » "hoc phan one snippets", "duc phan one snippets", "doc than one snippets", "doc phan cong snippets", "doc phan song 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: (((("doc phan one snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc phan one snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc phan one snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc phan one snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.