Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vong doi he snippets" » "trong doi he snippets", "huong doi he snippets", "dung doi he snippets", "vong do he snippets", "vong doi de snippets", "vong moi 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: (((("vong doi 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: (((("vong doi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vong doi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vong doi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.