Perhaps you should try some spelling variations:
"toan doc trinh slippers" » "toan doc tinh slippers", "toan doi trinh slippers", "toan hoc trinh slippers", "than doc trinh slippers", "toan do trinh slippers", "toan doc trinh slippery", "toan doc 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: (((("toan doc 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: (((("toan doc trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan doc trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan doc trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.