Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai duong he snippets" » "dai cuong he snippets", "hai phong he snippets", "hai duong che snippets", "hai dung he snippets", "hai duong ve 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: (((("hai duong he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hai duong he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai duong he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai duong he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.