Perhaps you should try some spelling variations:
"trinh van trinh snippets" » "trinh han trinh snippets", "trinh quan trinh snippets", "trinh toan trinh snippets", "trinh van thinh snippets", "trinh van tinh snippets", "trinh dan trinh snippets", "trinh van trinh slippers"
"dung ung code snippets" » "dung trung code snippets", "dung quang code snippets", "dung chung code snippets", "dung ung co snippets", "dung ung 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 van trinh snippets") or ("dung ung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van trinh snippets") OR ("dung ung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh van trinh snippets ) or ( dung ung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh van trinh snippets") or ("dung ung code snippets"))) or ("locating bug code snippets"))*.