Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dac cho cao snippets" » "day cho cao snippets", "danh cho cao snippets", "dac cho cac snippets", "dac cho dao snippets", "dac cho can 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: (((("dac cho cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dac cho cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dac cho cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dac cho cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.