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