Perhaps you should try some spelling variations:
"luong java java slippers" » "luong va java slippers", "luong java java slippery", "luong java java grippers"
"dung he trac snippets" » "dung cho trac snippets", "dung hoi trac snippets", "dung thi trac snippets", "dung hai trac 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: (((("luong java java slippers") or ("dung he trac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong java java slippers") OR ("dung he trac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong java java slippers ) or ( dung he trac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong java java slippers") or ("dung he trac snippets"))) or ("locating bug code snippets"))*.