Perhaps you should try some spelling variations:
"dung thuong 12 snippets" » "hang thuong 12 snippets", "dung trong 12 snippets", "cong thuong 12 snippets", "dung thuong va snippets", "dung thuong 汉语 snippets", "dung thang 12 snippets", "dung thuong 12 slippers"
"using java code snippets" » "using data code snippets", "using java core snippets", "using java code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "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 ("dung thuong 12 snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("dung thuong 12 snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dung thuong 12 snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dung thuong 12 snippets"))) or ("locating bug code snippets"))*.