Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc ca nghe snippets" » "doc cap nghe snippets", "doc cua nghe snippets", "doc cac nghe snippets", "doc cao nghe snippets", "doc va nghe 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 ca nghe 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 ca nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc ca nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc ca nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.