Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc tang son snippets" » "do tang son snippets", "duc tang son snippets", "soc trang son snippets", "doc trang son snippets", "doc lang son snippets", "doc bang son 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 tang son 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 tang son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc tang son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc tang son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.