Perhaps you should try some spelling variations:
"quang trinh java snippets" » "quang thinh java snippets", "quang ninh java snippets", "quang binh java snippets"
"dung cao cong snippets" » "duong cao cong snippets", "dung cho cong snippets", "dung co cong snippets", "dung cac cong snippets", "dung cao dang snippets", "dung cua 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: (((("quang trinh java snippets") or ("dung cao cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang trinh java snippets") OR ("dung cao cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang trinh java snippets ) or ( dung cao cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang trinh java snippets") or ("dung cao cong snippets"))) or ("locating bug code snippets"))*.