Perhaps you should try some spelling variations:
"dong hieu code snippets" » "dung hieu code snippets", "dong trieu code snippets", "doc hieu code snippets", "dong hieu code slippers"
"dcung bugs code snippets" » "dcung bugs code slippers", "dcung bungs code snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bung 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 hieu code snippets") or ("dcung bugs code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong hieu code snippets") OR ("dcung bugs code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong hieu code snippets ) or ( dcung bugs code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong hieu code snippets") or ("dcung bugs code snippets"))) or ("locating bug code snippets"))*.