Perhaps you should try some spelling variations:
"hanh tao trinh snippets" » "hanh tao tinh snippets", "hanh tho trinh snippets", "hanh giao trinh snippets", "hanh tai trinh snippets", "hanh dao trinh snippets", "hanh tam trinh snippets", "hanh tao trinh slippers"
"dung cho code snippets" » "dung cho cong snippets", "dung cfd code snippets", "dung cho con snippets", "dung cho 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: (((("hanh tao trinh snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh tao trinh snippets") OR ("dung cho code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh tao trinh snippets ) or ( dung cho code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh tao trinh snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))*.