Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"long van doc snippets" » "luong van doc snippets", "song van doc snippets", "lang van doc snippets", "long van duoc snippets", "long van hoc snippets", "long van loc snippets"
"locating bug code snippets" » "locating bug core 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 ("long van doc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("long van doc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( long van doc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("long van doc snippets"))) or ("locating bug code snippets"))*.