Perhaps you should try some spelling variations:
"van hai code snippets" » "van hai con snippets", "van ha code snippets", "van chat code snippets", "van hanh code snippets", "van hai code slippers"
"dung hoc code snippets" » "dong hoc code snippets", "dung thuoc code snippets", "trung hoc code snippets", "dung hoc co snippets", "dung hoc cong snippets", "dung hoc de snippets", "dung hoc code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("van hai code snippets") or ("dung hoc code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hai code snippets") OR ("dung hoc code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hai code snippets ) or ( dung hoc code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hai code snippets") or ("dung hoc code snippets"))) or ("locating bug code snippets"))*.