Perhaps you should try some spelling variations:
"do truong lon snippets" » "do truong long snippets", "do truong son snippets", "do truong ton snippets", "bo truong lon snippets", "do trung lon snippets", "de truong lon snippets"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("do truong lon snippets") or ("using data java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do truong lon snippets") OR ("using data java snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( do truong lon snippets ) or ( using data java snippets ))) or ( locating bug code snippets ))*.