Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets", "hang java java slippers"
"dong thuc hanh snippets" » "dong thuoc hanh snippets", "duong thuc hanh snippets", "cong thuc hanh snippets", "dong thuc hanh slippers", "dong thuc thanh snippets", "dong thuc anh snippets", "dong thuc hinh snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("hang java java snippets") or ("dong thuc hanh snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("dong thuc hanh snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( dong thuc hanh snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("dong thuc hanh snippets"))) or ("locating bug code snippets"))*.