Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lon van canh snippets" » "lon van anh snippets", "lon van hanh snippets", "lon van manh snippets", "long van canh snippets", "lo van canh snippets", "lon va 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: (((("lon 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: (((("lon van canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lon van canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lon van canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.