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