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