Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van tinh doi snippets" » "van thinh doi snippets", "van minh doi snippets", "ban tinh doi snippets", "van trinh doc snippets", "van trinh do snippets", "van tinh hoc snippets"
"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: (((("van tinh doi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tinh doi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tinh doi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tinh doi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.