Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan dan hoc snippets" » "phan dau hoc snippets", "gian dan hoc snippets", "nhan tai hoc snippets", "nhan van hoc snippets", "nhan dan toc snippets", "nhan dai 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: (((("nhan dan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan dan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan dan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan dan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.