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