Perhaps you should try some spelling variations:
"dung gian hieu snippets" » "duong gian hieu snippets", "dung giao hieu snippets", "dung giai hieu snippets", "dung gian viet snippets", "dung van hieu snippets", "dung tin hieu snippets", "dung gian hieu slippers"
"hang java java snippets" » "hang va java snippets", "hang java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 gian hieu 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 gian hieu snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung gian hieu snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung gian hieu snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.