Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"khoa than java snippets" » "khoa luan java snippets", "hoa thai java snippets", "hoa tan java snippets", "khoa think java snippets", "khoa than va snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"

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 ("dung java java slippers"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa than java snippets") OR ("dung java java slippers"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( khoa than java snippets ) or ( dung java java slippers ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa than java snippets") or ("dung java java slippers"))) or ("locating bugs code snippets"))*.