Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuat vat doc snippets" » "xuat va doc snippets", "xuat vac doc snippets", "thuat vat doc snippets", "xuat vat duoc snippets", "xuat vat hoc 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: (((("xuat vat doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuat vat doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuat vat doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuat vat doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.