Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong so ke snippets" » "cong san ke snippets", "cong hoa ke snippets", "cong so ky snippets", "cong do ke snippets", "cong so ki 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 so ke 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 so ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong so ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong so ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.