Perhaps you should try some spelling variations:
"trinh cac che snippets" » "trinh cau che snippets", "trinh chat che snippets", "trinh chao che snippets", "trinh cac he snippets", "trinh cac chien snippets", "trinh cac chat snippets"
"dong cfd code snippets" » "dong co code snippets", "dong cua code snippets", "dong cho code snippets", "dong cfd core snippets"
"locating bug code snippets" » "locating bug core snippets", "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: (((("dong cfd code snippets") or ("trinh cac che snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cfd code snippets") OR ("trinh cac che snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cfd code snippets ) or ( trinh cac che snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cfd code snippets") or ("trinh cac che snippets"))) or ("locating bug code snippets"))*.