Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc dieu con snippets" » "hoc dieu con snippets", "soc dieu con snippets", "thuoc dieu con snippets", "toc dieu can snippets", "toc diet con snippets", "toc dieu co 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: (((("toc dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc dieu con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc dieu con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.