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