Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap du hoan snippets" » "phap dau hoan snippets", "phap tu hoan snippets", "pha du hoan snippets", "phap duc hoan snippets", "phap du doan snippets", "phap su hoan 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: (((("phap du hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap du hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap du hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap du hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.