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