Perhaps you should try some spelling variations:
"van ngu va snippets" » "han ngu va snippets", "van nga va snippets", "van ngo va snippets", "van ngu van snippets", "van ngu ca snippets", "van nguoi va snippets", "van ngu va slippers"
"hanhg java java snippets" » "hanhg java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("van ngu va snippets") or ("hanhg java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van ngu va snippets") OR ("hanhg java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ngu va snippets ) or ( hanhg java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngu va snippets") or ("hanhg java java snippets"))) or ("locating bug code snippets"))*.