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