Perhaps you should try some spelling variations:
"using java java slippery" » "using data java slippery", "using java java slippers"
"van truong va snippets" » "tang truong va snippets", "xuan truong va snippets", "vien truong va snippets", "van truong dai snippets", "van truong cao snippets", "van truong dao snippets", "van truong va slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java java slippery") or ("van truong va snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java java slippery") OR ("van truong va snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( using java java slippery ) or ( van truong va snippets ))) or ( locating bug code snippets ))*.