Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc hang du snippets" » "luc sang du snippets", "duc thang du snippets", "duc hoang du snippets", "luc hang dau snippets", "luc hoang du snippets", "luc nang du 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: (((("luc hang 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: (((("luc hang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc hang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc hang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.