Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nha hieu do snippets" » "nha dieu do snippets", "nghe hieu do snippets", "phan hieu do snippets", "nha hieu so snippets", "nha hieu bo snippets", "nha bieu do 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 do 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 do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nha hieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nha hieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.