Perhaps you should try some spelling variations:
"quang khai code snippets" » "quang hoi code snippets", "quan hai code snippets", "quang ngai code snippets", "quang khai code slippers"
"cong cau code snippets" » "cong cu code snippets", "cong chuc code snippets", "thong cau code snippets", "cong cau cong snippets", "cong cau de snippets", "cong cfd code snippets", "cong cau 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: (((("quang khai code snippets") or ("cong cau code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang khai code snippets") OR ("cong cau code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang khai code snippets ) or ( cong cau code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang khai code snippets") or ("cong cau code snippets"))) or ("locating bug code snippets"))*.