Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"tung dan bot snippets" » "dung dan bot snippets", "huong dan bot snippets", "trung dai bot snippets", "tung dang bot snippets", "tung dan bon snippets", "tung dan hoat 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 ("tung dan bot snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("tung dan bot snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( tung dan bot snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("tung dan bot snippets"))) or ("locating bug code snippets"))*.