Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhung ky de snippets" » "nhung quy de snippets", "hong ky de snippets", "nhung bi de snippets", "nhung ky le snippets", "nhung ly de snippets", "nhung y de 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: (((("nhung ky de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhung ky de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung ky de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung ky de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.