Perhaps you should try some spelling variations:
"cong iao trinh slippers" » "cong giao trinh slippers", "cong tao trinh slippers", "cong lap trinh slippers", "cong bao trinh slippers", "cong cao trinh slippers", "cong iao trinh slippery", "cong iao trinh grippers"
"dung java java snippets" » "dung va java 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: (((("cong iao 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: (((("cong iao trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong iao trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong iao trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.