Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che thu canh snippets" » "che thuc hanh snippets", "che thu cong snippets", "che thu ban snippets", "che thuy canh snippets", "che phu canh snippets", "che tu 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: (((("che thu 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: (((("che thu canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che thu canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che thu canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.