Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam duoi hoc snippets" » "nam duoc hoc snippets", "nam doi hoc snippets", "dam duoi hoc snippets", "nam duoi goc snippets", "nam duong hoc 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 duoi hoc 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 duoi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam duoi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam duoi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.