Perhaps you should try some spelling variations:
"dung cuang du snippets" » "dung quang du snippets", "dung luan du snippets", "dung cong du snippets", "dung chuang yu snippets", "dung quang duc snippets", "dung quang duy snippets"
"hang java java snippets" » "hang 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: (((("dung cuang du 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 cuang du snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cuang du snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cuang du snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.