Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan tra du snippets" » "dan ta du snippets", "van tra du snippets", "dang tran du snippets", "dan tra tu snippets", "dan tran duc snippets", "dan tran duy snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dan tra du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan tra du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan tra du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan tra du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.