Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong tan con snippets" » "cong tac con snippets", "cong san con snippets", "cong thanh con snippets", "cong tan cong snippets", "cong tao con snippets", "cong ta con 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 tan con 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 tan con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tan con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tan con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.