Perhaps you should try some spelling variations:
"dung nguoi java snippets" » "dung nguon java snippets", "nhung nguoi java snippets", "dung nguoi va snippets", "dung ngu java snippets", "dung nguoi bana snippets"
"dung tao chat snippets" » "dung tai chat snippets", "dung bao chat snippets", "dung tay chat snippets", "dung cao chat snippets", "dung van chat snippets", "dung tao cao 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 nguoi java snippets") or ("dung tao chat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nguoi java snippets") OR ("dung tao chat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung nguoi java snippets ) or ( dung tao chat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung nguoi java snippets") or ("dung tao chat snippets"))) or ("locating bug code snippets"))*.