Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"missing data java snippets" » "using data java snippets", "missing java java snippets", "missing data java slippers"
"van cong li snippets" » "van dong li snippets", "van phong li snippets", "phan cong li snippets", "van cong ti snippets", "van hong li snippets", "van cong hai snippets", "van cong li slippers"

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 ("van cong li snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("missing data java snippets") OR ("van cong li snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( missing data java snippets ) or ( van cong li snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("missing data java snippets") or ("van cong li snippets"))) or ("locating bugs code snippets"))*.