Perhaps you should try some spelling variations:
"using java java slippers" » "using data java slippers", "using java java slippery", "using java java grippers"
"khoa than java snippets" » "khoa luan java snippets", "hoa thai java snippets", "hoa tan java snippets", "khoa think java snippets", "khoa than va 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: (((("khoa than java snippets") or ("using java java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa than java snippets") OR ("using java java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa than java snippets ) or ( using java java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa than java snippets") or ("using java java slippers"))) or ("locating bug code snippets"))*.