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