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