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