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