Perhaps you should try some spelling variations:
"vi cong dong snippets" » "vi cong code snippets", "voi cong dong snippets", "va cong dong snippets", "vu cong dong snippets"
"locating bug core snippets" » "locating bug code snippets"
"missing data java snippets" » "using data java snippets", "missing java java snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("missing data java snippets") or ("vi cong dong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("missing data java snippets") OR ("vi cong dong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( missing data java snippets ) or ( vi cong dong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("missing data java snippets") or ("vi cong dong snippets"))) or ("locating bug core snippets"))*.