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