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