Perhaps you should try some spelling variations:
"dusing java java snippets" » "using java java snippets"
"van ngoc java slippers" » "van ngu java slippers", "tran ngoc java slippers", "van hoc java slippers", "van nghe java slippers", "van ngoc java slippery", "van ngoc 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: (((("van ngoc 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: (((("van ngoc java slippers") OR ("dusing java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ngoc java slippers ) or ( dusing java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngoc java slippers") or ("dusing java java snippets"))) or ("locating bug code snippets"))*.