Perhaps you should try some spelling variations:
"tuan hanh trinh slippers" » "tuan canh tranh slippers", "tuan hanh chinh slippers", "tuan anh trinh slippers", "quan hanh trinh slippers", "toan hanh trinh slippers", "tuan hanh trinh slippery", "tuan hanh 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: (((("tuan hanh 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: (((("tuan hanh trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tuan hanh trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuan hanh trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.