Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chu toan he snippets" » "chi toan he snippets", "chu tuan he snippets", "cuu toan he snippets", "chu toan ho snippets", "chu toan ke snippets", "chu toan ve 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: (((("chu toan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chu toan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chu toan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chu toan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.