Perhaps you should try some spelling variations:
"duong van hoe snippets" » "duong va hoe snippets", "luong va hoe snippets", "dang van hoe snippets", "duong van hoa snippets", "duong van hoc snippets", "duong van hieu snippets"
"dung vbug code snippets" » "dung vung code snippets", "dung vbung code snippets", "dung vbugs code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

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