Perhaps you should try some spelling variations:
"quang trung java snippets" » "truong trung java snippets", "quang trung va snippets", "quang trinh java snippets", "quang trung java slippers"
"ngu java java snippets" » "ngu va java snippets", "ngu java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 trung java snippets") or ("ngu java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang trung java snippets") OR ("ngu java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang trung java snippets ) or ( ngu java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang trung java snippets") or ("ngu java java snippets"))) or ("locating bug code snippets"))*.