Perhaps you should try some spelling variations:
"do van code snippets" » "do van de snippets", "do van hoe snippets", "do van cong snippets", "dao van code snippets", "vo van code snippets", "so van code snippets", "do van code slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers"
"locating bug code snippets" » "locating bug code slippers"

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: (((("do van code snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do van code snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do van code snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do van code snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.