Perhaps you should try some spelling variations:
"hai luong java slippers" » "hai luong va slippers", "hai duong java slippers", "hai long java slippers", "dai luong java slippers", "hai luong java slippery", "hai luong java grippers"
"using java java snippets" » "using data java 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: (((("hai luong 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: (((("hai luong java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai luong java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai luong java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.