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