Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi tra du snippets" » "thi tran du snippets", "thi trac du snippets", "thi ra du snippets", "thi tra tu snippets", "thi tran duc snippets", "thi 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: (((("thi 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: (((("thi tra du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi tra du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi tra du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.