Perhaps you should try some spelling variations:
"dang dung chet snippets" » "dang dung code snippets", "dan dung chet snippets", "dang hung chet snippets", "dang quang chet snippets", "dang dung chat snippets", "dang dung che snippets", "dang dung chien snippets"
"locating bug core snippets" » "locating bug code 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: (((("dang dung chet snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang dung chet snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dang dung chet snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang dung chet snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.