Perhaps you should try some spelling variations:
"duoc chat cao snippets" » "doc chat cao snippets", "duoc pham cao snippets", "hoc chat cao snippets", "duoc chat co snippets", "duoc chat cho snippets", "duoc chat bao 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: (((("duoc chat cao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc chat cao snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc chat cao snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc chat cao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.