Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong le cong snippets" » "cuong le cong snippets", "cong li cong snippets", "hong le cong snippets", "cong len cong snippets", "cong te cong snippets", "cong ve cong 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: (((("cong le cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong le cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong le cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong le cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.