Perhaps you should try some spelling variations:
"va trinh java snippets" » "van trinh java snippets", "va tinh java snippets", "lap trinh java snippets"
"dung may cong snippets" » "dung va cong snippets", "dung tai cong snippets", "mang may cong snippets", "dung cay cong snippets", "dung cac cong snippets", "dung cao cong 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: (((("va trinh java snippets") or ("dung may cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va trinh java snippets") OR ("dung may cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va trinh java snippets ) or ( dung may cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va trinh java snippets") or ("dung may cong snippets"))) or ("locating bug code snippets"))*.