Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam van canh snippets" » "dam van anh snippets", "dam van hanh snippets", "dam van manh snippets", "dao van canh snippets", "nam van canh snippets", "pham van canh 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: (((("dam van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dam van canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam van canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.