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