Perhaps you should try some spelling variations:
"tuan hoang cd snippets" » "quan hoang cd snippets", "tran hoang cd snippets", "xuan hoang cd snippets", "tuan hoang cao snippets", "tuan hoang chi snippets", "tuan hoang _ 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: (((("tuan hoang cd snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tuan hoang cd snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tuan hoang cd snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuan hoang cd snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.