Perhaps you should try some spelling variations:
"cong vinh trac slippers" » "cong trinh trac slippers", "trong vinh trac slippers", "cong viec trac slippers", "cong sinh trac slippers", "cong vinh tran slippers", "cong anh trac slippers", "cong vinh trac slippery", "cong vinh trac 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 vinh trac 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 vinh trac slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong vinh trac slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong vinh trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.