Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc dung co snippets" » "hoc dung co snippets", "tac dung co snippets", "toc nung co snippets", "toc dung cho snippets", "toc dung cong snippets", "toc dung cua 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 dung co 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 dung co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc dung co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc dung co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.