Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan xuan co snippets" » "dang xuan co snippets", "doan xuan co snippets", "dan luan co snippets", "dan xuan ho snippets", "dan quan co snippets", "dan xuan can 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: (((("dan xuan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan xuan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan xuan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan xuan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.