Perhaps you should try some spelling variations:
"duoc hieu cac snippets" » "doc hieu cac snippets", "duoc lieu cac snippets", "duc hieu cac snippets", "duoc hieu luc snippets", "duoc hieu va snippets", "duoc hieu van snippets"
"dung va java snippets" » "dung java 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 va java snippets") or ("duoc hieu cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("duoc hieu cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( duoc hieu cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("duoc hieu cac snippets"))) or ("locating bug code snippets"))*.