Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham le hoan snippets" » "phan le hoan snippets", "pham lan hoan snippets", "pham le hoang snippets", "pham le doan snippets", "pham de 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: (((("pham le 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: (((("pham le hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham le hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham le hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.