Perhaps you should try some spelling variations:
"trinh cac chat snippets" » "trinh cau chat snippets", "trinh chat chat snippets", "trinh chao chat snippets", "trinh cao chat snippets", "trinh cac thuat snippets", "trinh cac nha snippets"
"dung cho code snippets" » "dung cho cong snippets", "dung cfd code snippets", "dung cho con snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"trinh cac chat snippets\") OR (\"dung cho code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh cac chat snippets ) OR ( dung cho code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh cac chat snippets") OR ("dung cho code snippets"))) OR ("locating bug code snippets"))*.