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