Perhaps you should try some spelling variations:
"phan trong che snippets" » "pham trong che snippets", "nhan trong che snippets", "phan tong che snippets", "phan trong cho snippets", "phan trong chien snippets", "phan trong cham snippets"
"dong cung code snippets" » "dong chung code snippets", "dong hung code snippets", "dong cong code snippets"
"locating bug code 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: (((("phan trong che snippets") or ("dong cung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan trong che snippets") OR ("dong cung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan trong che snippets ) or ( dong cung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan trong che snippets") or ("dong cung code snippets"))) or ("locating bug code snippets"))*.