Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran manh du snippets" » "tran minh du snippets", "tran thanh du snippets", "tran van du snippets", "tran manh duy snippets", "tran manh tu snippets", "tran anh du 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: (((("tran manh 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: (((("tran manh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran manh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran manh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.