Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xen van cong snippets" » "xen van dong snippets", "xen van phong snippets", "xen phan cong snippets", "nen van cong snippets", "xen ban cong snippets", "dien van 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: (((("xen van 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: (((("xen van cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xen van cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xen van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.