Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam he mo snippets" » "nam ha mo snippets", "nam hien mo snippets", "nam nghe mo snippets", "nam he moi snippets", "nam he co snippets", "nam ke mo 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: (((("nam he mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam he mo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam he mo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam he mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.