Perhaps you should try some spelling variations:
"dusing java java snippets" » "using java java snippets"
"quoc huy java slippers" » "quoc hung java slippers", "quoc hoi java slippers", "qua huy java slippers", "quoc huy java slippery", "quoc huy 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: (((("quoc huy 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: (((("quoc huy java slippers") OR ("dusing java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc huy java slippers ) or ( dusing java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc huy java slippers") or ("dusing java java snippets"))) or ("locating bug code snippets"))*.