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