Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham sach mo snippets" » "pham anh mo snippets", "nam sach mo snippets", "pham hanh mo snippets", "pham sach moi snippets", "pham sach lo snippets", "pham sach dao 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 sach mo 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 sach mo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham sach mo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham sach mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.