Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"van viet trinh snippets" » "van viet trung snippets", "van viet thanh snippets", "van viet trong snippets", "san viet trinh snippets", "gian viet trinh snippets", "tran viet trinh snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"

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: (((("van viet trinh snippets") or ("dung java java slippers"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van viet trinh snippets") OR ("dung java java slippers"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( van viet trinh snippets ) or ( dung java java slippers ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van viet trinh snippets") or ("dung java java slippers"))) or ("locating bugs code snippets"))*.