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