Perhaps you should try some spelling variations:
"dung using java slippers" » "dung ung java slippers", "dung sinh java slippers", "dung uong java slippers", "dung using data slippers", "dung using java slippery", "dung using java grippers"
"dong san tao snippets" » "cong san tao snippets", "dong bang tao snippets", "dong von tao snippets", "dong sang tao snippets", "dong san bao snippets", "dong san tay 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 using java slippers") or ("dong san tao snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung using java slippers") OR ("dong san tao snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung using java slippers ) or ( dong san tao snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung using java slippers") or ("dong san tao snippets"))) or ("locating bug code snippets"))*.