Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"khoa than java slippers" » "khoa luan java slippers", "hoa thai java slippers", "hoa tan java slippers", "khoa think java slippers", "khoa than va slippers", "khoa than java slippery", "khoa than 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: (((("khoa than 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: (((("khoa than java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa than java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa than java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.