Perhaps you should try some spelling variations:
"dung dan java snippets" » "dung dat java snippets", "dung san java snippets", "tung dan java snippets", "dung dan va snippets"
"dong san cong snippets" » "cong san cong snippets", "dong bang cong snippets", "dong von cong snippets", "dong sang cong snippets", "dong van cong snippets", "dong ban cong 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 dan java snippets") or ("dong san cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dan java snippets") OR ("dong san cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dan java snippets ) or ( dong san cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dan java snippets") or ("dong san cong snippets"))) or ("locating bug code snippets"))*.