Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan xuan do snippets" » "pham xuan do snippets", "phan quan do snippets", "phan xuat do snippets", "phan xuan dao snippets", "phan xuan du snippets", "phan xuan ho 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 xuan do 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 xuan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan xuan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan xuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.