Perhaps you should try some spelling variations:
"dung thanh cao snippets" » "dong thanh cao snippets", "dang thanh cao snippets", "dung thang cao snippets", "dung thanh ca snippets", "dung thanh cac snippets", "dung thanh thao snippets"
"hang java java snippets" » "hang 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: (((("dung thanh cao snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung thanh cao snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thanh cao snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thanh cao snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.