Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa viet du snippets" » "khoan viet du snippets", "hoa viet du snippets", "thoai viet du snippets", "khoa viet duc snippets", "khoa viet duy snippets", "khoa viet tu 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 viet 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: (((("khoa viet du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa viet du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa viet du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.