Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"chinh danh doc snippets" » "chinh doanh doc snippets", "chinh dang doc snippets", "chinh sach doc snippets", "chinh anh doc snippets", "chinh dinh doc snippets", "chinh danh hoc 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 ("chinh danh 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 ("chinh danh doc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( chinh danh doc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("chinh danh doc snippets"))) or ("locating bug code snippets"))*.