Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"mang viet long snippets" » "nang viet long snippets", "anh viet long snippets", "mai viet long snippets", "mang viet dong snippets", "mang viet song snippets", "mang viet huong 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 ("mang viet long snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("mang viet long snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( mang viet long snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("mang viet long snippets"))) or ("locating bug code snippets"))*.