Perhaps you should try some spelling variations:
"dong tran hoang snippets" » "dong quan hoang snippets", "dong tran quang snippets", "dong tranh hang snippets", "dong tranh hoang snippets", "dang tran hoang snippets", "dong tren hoang snippets", "dong tran hoang slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core 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 tran hoang snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tran hoang snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tran hoang snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tran hoang snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.