Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"huu trac do snippets" » "huu thac do snippets", "hoi trac do snippets", "huu tuan do snippets", "huu trac ho snippets", "huu trac dia snippets", "huu trac hoc 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: (((("huu trac 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: (((("huu trac do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( huu trac do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("huu trac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.