Perhaps you should try some spelling variations:
"dong nhan chat snippets" » "dong nhan chan snippets", "dong phan chat snippets", "dong chuan chat snippets", "dung nhan chat snippets", "cong nhan chat snippets", "dong chan chat snippets"
"dung va java snippets" » "dung java java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 va java snippets") or ("dong nhan chat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("dong nhan chat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( dong nhan chat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("dong nhan chat snippets"))) or ("locating bug code snippets"))*.