Perhaps you should try some spelling variations:
"van luong cong snippets" » "van luong code snippets", "van dung cong snippets", "van trong cong snippets", "van cong cong snippets", "van duong cong snippets", "van cuong cong snippets", "nang luong cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data 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: (((("using data java snippets") OR ("van luong cong snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using data java snippets\") OR (\"van luong cong snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using data java snippets ) OR ( van luong cong snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using data java snippets") OR ("van luong cong snippets"))) OR ("locating bug core snippets"))*.