Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat hang du snippets" » "dat khanh du snippets", "dat quang du snippets", "tat thang du snippets", "dat hang dau snippets", "dat hoang du snippets", "dat nang du 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 hang 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 hang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat hang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat hang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.