Perhaps you should try some spelling variations:
"boc ngan java slippers" » "boc ngu java slippers", "bo ngan java slippers", "hoc nganh java slippers", "buoi ngan java slippers", "boc ngan java slippery", "boc ngan java grippers"
"dung java java snippets" » "dung va 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: (((("boc ngan java slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("boc ngan java slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( boc ngan java slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("boc ngan java slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.