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