Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong so fe snippets" » "cong san fe snippets", "cong hoa fe snippets", "cong so le snippets", "cong so xe snippets", "cong co fe 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 so fe 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 so fe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong so fe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong so fe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.