Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua duc den snippets" » "cua tuc den snippets", "cua nuoc den snippets", "cua quoc den snippets", "cua duc dien snippets", "cua duc dan snippets", "cua duy den 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: (((("cua duc den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua duc den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua duc den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua duc den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.