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