Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van truan doi snippets" » "van truan code snippets", "van tuan doi snippets", "van thuan doi snippets", "van ruan doi snippets", "van truyen doi snippets", "van quan doi snippets", "van khuan doi snippets"
"dung java java snippets" » "dung va java 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: (((("dung java java snippets") or ("van truan doi snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van truan doi snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van truan doi snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van truan doi snippets"))) or ("locating bug core snippets"))*.