Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chuong gi de snippets" » "chuong moi de snippets", "chuong my de snippets", "nhung gi de snippets", "chuong gia de snippets", "chuong ga de snippets", "chuong gi he 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: (((("chuong gi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chuong gi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chuong gi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chuong gi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.