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