Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung tri cong snippets" » "dung tai cong snippets", "dung tren cong snippets", "nhung tri cong snippets", "dung thi cong snippets", "dung trien cong 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: (((("dung tri cong snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tri cong snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tri cong snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tri cong snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.