Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngan danh do snippets" » "ngan hang do snippets", "ngan sach do snippets", "nhan dan do snippets", "ngan dang do snippets", "ngan danh co snippets", "ngan danh di 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: (((("ngan danh 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: (((("ngan danh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngan danh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngan danh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.