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