Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung van hanh slippers" » "duong van hanh slippers", "dung va hanh slippers", "dang van hanh slippers", "dung van thanh slippers", "dung ban hanh slippers", "dung van anh slippers", "dung van hanh slippery", "dung van 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 van 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 van hanh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung van hanh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung van hanh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.