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