Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong le con snippets" » "cuong le con snippets", "cong li con snippets", "hong le con snippets", "cong le cong snippets", "cong len con snippets", "cong le 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: (((("cong le 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: (((("cong le con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong le con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong le con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.