Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan moi doi snippets" » "nha moi doi snippets", "nhan mo doi snippets", "nhat moi doi snippets", "nhan voi doi snippets", "nhan hoi doi snippets", "nhan 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: (((("nhan 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: (((("nhan moi doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan moi doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan moi doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.