Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"voi cong cau snippets" » "noi cong cau snippets", "moi cong cau snippets", "tai cong cau snippets", "voi cong cu snippets", "voi cong chuc snippets", "voi thong cau 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 ("voi cong cau snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("voi cong cau snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( voi cong cau snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("voi cong cau snippets"))) or ("locating bug code snippets"))*.