Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu che cong snippets" » "thu cho cong snippets", "thu chi cong snippets", "thu he cong snippets", "thue che cong snippets", "tu che 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: (((("thu che 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: (((("thu che cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu che cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu che cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.