Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nha moi doi snippets" » "nha noi doi snippets", "nhap mon doi snippets", "nghe moi doi snippets", "nha voi doi snippets", "nha hoi doi snippets", "nha moi voi 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: (((("nha moi doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nha moi doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nha moi doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nha moi doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.