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