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