Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong ngu che snippets" » "song ngu che snippets", "cong ngo che snippets", "nong ngu che snippets", "cong nghe che snippets", "cong ngu 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: (((("cong ngu che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong ngu che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong ngu che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong ngu che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.