Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen dong cao snippets" » "nen mong cao snippets", "den dong cao snippets", "nen cong cao snippets", "nen duong cao snippets", "nen dong co snippets", "nen dong cho 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: (((("nen dong cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nen dong cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen dong cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen dong cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.