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