Perhaps you should try some spelling variations:
"duong linh toc snippets" » "cuong linh toc snippets", "duong minh toc snippets", "duong sinh toc snippets", "duong linh thuoc snippets", "duong dinh toi snippets", "duong linh vuc snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "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: (((("duong linh toc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong linh toc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong linh toc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong linh toc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.