Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach pha deu snippets" » "sach phat deu snippets", "sach phap deu snippets", "sach nha deu snippets", "sach pha du snippets", "sach nha dieu snippets", "sach pha kieu 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: (((("sach pha deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach pha deu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach pha deu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach pha deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.