Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using c snippets" » "python using code snippets", "python using lc snippets", "python using a snippets", "python using _ snippets"
"viet trinh java snippets" » "viet trung java snippets", "viet thanh java snippets", "viet trong java 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: (((("python using c snippets") or ("viet trinh java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using c snippets") OR ("viet trinh java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using c snippets ) or ( viet trinh java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using c snippets") or ("viet trinh java snippets"))) or ("locating bug core snippets"))*.