Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van sung voi snippets" » "van dung voi snippets", "van hung voi snippets", "van duong voi snippets", "van sung vi snippets", "van tuong voi 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 sung voi 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 sung voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van sung voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van sung voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.