Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lenh xu dong snippets" » "lenh tu dong snippets", "lenh xa dong snippets", "lenh huy dong snippets", "linh xu dong snippets", "benh xu dong snippets", "len xu dong 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: (((("lenh xu dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lenh xu dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lenh xu dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lenh xu dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.