Perhaps you should try some spelling variations:
"using data a snippets" » "using java a snippets", "using sat a snippets", "missing data a snippets", "using data _ snippets", "using data 4 snippets"
"vi luong code snippets" » "vi luong cong snippets", "vi luong che snippets", "dai luong code snippets", "van luong code snippets", "hai luong code snippets"
"locating bug core snippets" » "locating bug code 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 a snippets") OR ("vi luong code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using data a snippets\") OR (\"vi luong code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using data a snippets ) OR ( vi luong code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using data a snippets") OR ("vi luong code snippets"))) OR ("locating bug core snippets"))*.