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