Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"vung van code slippers" » "vung va code slippers", "dung van code slippers", "vung ven code slippers", "vung van de slippers", "vung van hoe slippers", "vung van cong slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("using java code snippets") or ("vung van code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("vung van code slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( vung van code slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("vung van code slippers"))) or ("locating bug code snippets"))*.