Perhaps you should try some spelling variations:
"dung cho code snippets" » "dung cho cong snippets", "dung cfd code snippets", "dung cho con snippets", "dung cho code slippers"
"dong da data snippets" » "dong dat data snippets", "dong dao data snippets", "dong ha data snippets", "dong a data snippets", "dong da data 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: (((("dung cho code snippets") or ("dong da data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cho code snippets") OR ("dong da data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cho code snippets ) or ( dong da data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cho code snippets") or ("dong da data snippets"))) or ("locating bug code snippets"))*.