Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu moi cho snippets" » "hieu moi cho snippets", "lieu boi cho snippets", "lieu moc cho snippets", "lieu moi co snippets", "lieu hoi cho snippets", "lieu mo cho 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: (((("lieu moi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu moi cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu moi cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu moi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.