Perhaps you should try some spelling variations:
"dung quang do snippets" » "dang quang do snippets", "luong quang do snippets", "dung luan do snippets", "dung quang d snippets", "dung quang de snippets", "dung quang dong snippets"
"dong va java snippets" » "dung va java snippets", "dong ha java snippets", "luong va java snippets", "dong 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: (((("dong va java snippets") or ("dung quang do snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong va java snippets") OR ("dung quang do snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong va java snippets ) or ( dung quang do snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong va java snippets") or ("dung quang do snippets"))) or ("locating bug code snippets"))*.