Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"missing data a snippets" » "using data a snippets", "missing data _ snippets", "missing data 4 snippets", "missing data a slippers"
"van tuan java snippets" » "van quan java snippets", "van ban java snippets", "anh tuan java snippets", "van tuan java slippers"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"van tuan java snippets\") OR (\"missing data a snippets\"))) OR (\"locating bugs code snippets\"))~".
• Removing quotes may allow a broader search: (((( van tuan java snippets ) OR ( missing data a snippets ))) OR ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van tuan java snippets") OR ("missing data a snippets"))) OR ("locating bugs code snippets"))*.