Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham phan le snippets" » "phap phan le snippets", "pham phap le snippets", "pham nhan le snippets", "pham pham le snippets", "pham phan mem snippets", "pham phan lap 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: (((("pham phan 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: (((("pham phan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham phan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham phan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.