Perhaps you should try some spelling variations:
"dung hoc thuc snippets" » "dong hoc thuc snippets", "dung thuoc thuc snippets", "trung hoc thuc snippets", "dung hoc huu snippets", "dung hoc thuc slippers"
"dung vbugs code snippets" » "dung vbugs code slippers", "dung vbungs code snippets", "dung vbugss code snippets"
"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 hoc thuc snippets") or ("dung vbugs code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hoc thuc snippets") OR ("dung vbugs code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hoc thuc snippets ) or ( dung vbugs code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hoc thuc snippets") or ("dung vbugs code snippets"))) or ("locating bug code snippets"))*.