Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc manh do snippets" » "suc manh do snippets", "duc anh do snippets", "duc minh do snippets", "duc manh ho snippets", "duc lanh dao snippets", "duc manh hon 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: (((("duc manh 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: (((("duc manh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc manh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc manh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.