Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"moi va doan snippets" » "moi va doanh snippets", "moi van doan snippets", "moi va dan snippets", "hoi va doan snippets", "mai va doan snippets", "moi ve doan 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: (((("moi va doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("moi va doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( moi va doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("moi va doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.