Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat xuan du snippets" » "dao xuan du snippets", "dat luan du snippets", "dac xuan du snippets", "dat xuan duc snippets", "dat xuan huy snippets", "dat xuan thu 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: (((("dat xuan 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: (((("dat xuan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat xuan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat xuan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.