Perhaps you should try some spelling variations:
"dusing java java snippets" » "using java java snippets"
"thu ngan java slippers" » "thu ngu java slippers", "tu ngan java slippers", "tai ngan java slippers", "vu ngan java slippers", "thu ngan java slippery", "thu ngan 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: (((("thu ngan java slippers") or ("dusing java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu ngan java slippers") OR ("dusing java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu ngan java slippers ) or ( dusing java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu ngan java slippers") or ("dusing java java snippets"))) or ("locating bug code snippets"))*.