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