Perhaps you should try some spelling variations:
"van tinh java snippets" » "van trinh java snippets", "van think java snippets", "van tinh va snippets", "van thinh java snippets", "van minh java snippets", "ban tinh java snippets", "van tinh java slippers"
"cong cau code snippets" » "cong cu code snippets", "cong chuc code snippets", "thong cau code snippets", "cong cau cong snippets", "cong cau de snippets", "cong cfd code snippets", "cong cau code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("cong cau code snippets") or ("van tinh java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong cau code snippets") OR ("van tinh java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cau code snippets ) or ( van tinh java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cau code snippets") or ("van tinh java snippets"))) or ("locating bug code snippets"))*.