Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong hai don snippets" » "cong thai don snippets", "cong ha don snippets", "hoang hai don snippets", "cong hai con snippets", "cong hai dan snippets", "cong hai 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: (((("cong hai don 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 hai don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hai don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hai don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.