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