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