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