Perhaps you should try some spelling variations:
"cong van trinh snippets" » "cong van thinh snippets", "cong van tinh snippets", "cong dan trinh snippets", "cong vang trinh snippets", "cong san trinh snippets", "song van trinh snippets", "cong van trinh slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core 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: (((("cong van trinh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong van trinh snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong van trinh snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van trinh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.