Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap cong du snippets" » "phan cong du snippets", "pham cong du snippets", "phap phong du snippets", "phap cong dau snippets", "phap cong duc snippets", "phap cong duy 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: (((("phap cong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap cong du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap cong du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap cong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.