Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong hat chu snippets" » "cong nhat chu snippets", "cong chat chu snippets", "cong ha chu snippets", "cong hat chau snippets", "cong hai chu snippets", "cong hat cu 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 hat chu 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 hat chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hat chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hat chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.