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