Perhaps you should try some spelling variations:
"trinh han lam slippers" » "trinh quan lam slippers", "trinh hanh lam slippers", "trinh phan lam slippers", "trinh van lam slippers", "trinh han lam slippery", "trinh han lam 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: (((("trinh han lam slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh han lam slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh han lam slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh han lam slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.