Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan hang di snippets" » "phan dang di snippets", "pham hang di snippets", "phan hong di snippets", "phan hang doi snippets", "phan hang vi snippets", "phan hang dien 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 hang di 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 hang di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan hang di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan hang di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.