Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"dang using java snippets" » "dang sinh java snippets", "data using java snippets", "dang ung java snippets", "dang using data snippets"
"dong luc cong snippets" » "nang luc cong snippets", "dong luoc cong snippets", "dong duc cong snippets", "dong luc dong 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: (((("dong luc cong snippets") or ("dang using java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong luc cong snippets") OR ("dang using java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dong luc cong snippets ) or ( dang using java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luc cong snippets") or ("dang using java snippets"))) or ("locating bugs code snippets"))*.