Perhaps you should try some spelling variations:
"dong dinh chat snippets" » "dong kinh chat snippets", "dang dinh chat snippets", "dong ninh chat snippets", "dong tinh chat snippets", "dong dinh chau snippets", "dong trinh chat snippets"
"dung java java snippets" » "dung va 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: (((("dong dinh chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong dinh chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong dinh chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong dinh chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.