Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc hoang du snippets" » "duc hoang du snippets", "do hoang du snippets", "moc hoang du snippets", "doc hoang duy snippets", "doc hoang duc snippets", "doc hoang de 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: (((("doc hoang 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: (((("doc hoang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc hoang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc hoang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.