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