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