Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van than da snippets" » "van thanh da snippets", "van thang da snippets", "van tuan da snippets", "van than va snippets", "van than ha snippets", "van than ma 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: (((("van than da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van than da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van than da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van than da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.