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