Perhaps you should try some spelling variations:
"danh lieu tinh slippers" » "dan lieu tinh slippers", "danh hieu tinh slippers", "danh lien tinh slippers", "danh trieu tinh slippers", "danh diep tinh slippers", "danh bien tinh slippers", "danh lieu tinh slippery", "danh lieu tinh 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: (((("danh lieu tinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh lieu tinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh lieu tinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh lieu tinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.