Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van nhe cac snippets" » "van nghe cac snippets", "van nhi cac snippets", "van he cac snippets", "van nghe cao snippets", "van nghe cnc 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 nhe cac 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 nhe cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van nhe cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van nhe cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.