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"
"dong cho code snippets" » "dung cho code snippets", "dong co code snippets", "dong hoc code snippets", "dong cho cong snippets", "dong cfd code snippets", "dong cho con snippets", "dong cho 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: (((("van tinh java snippets") or ("dong cho code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tinh java snippets") OR ("dong cho code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tinh java snippets ) or ( dong cho code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tinh java snippets") or ("dong cho code snippets"))) or ("locating bug code snippets"))*.