Perhaps you should try some spelling variations:
"dao vung code snippets" » "dao vung co snippets", "dan vung code snippets", "dao cuong code snippets", "dao van code snippets", "dao vung code slippers"
"dong luc code snippets" » "nang luc code snippets", "dong lbm code snippets", "dong luc cong snippets", "dong luc code slippers"
"locating bug code 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: (((("dong luc code snippets") or ("dao vung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong luc code snippets") OR ("dao vung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong luc code snippets ) or ( dao vung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luc code snippets") or ("dao vung code snippets"))) or ("locating bug code snippets"))*.