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