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