Perhaps you should try some spelling variations:
"pham trinh java snippets" » "pham tinh java snippets", "pham minh java snippets", "pham thanh java snippets"
"dung cho con snippets" » "dung cho cong snippets", "dung cho lon snippets", "dung cho can snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dung cho con snippets") or ("pham trinh java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cho con snippets") OR ("pham trinh java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cho con snippets ) or ( pham trinh java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cho con snippets") or ("pham trinh java snippets"))) or ("locating bug code snippets"))*.