Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu danh du snippets" » "thu canh du snippets", "thu anh du snippets", "thu dang du snippets", "thu danh dau snippets", "thu danh tu snippets", "thu dinh 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: (((("thu danh 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: (((("thu danh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu danh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu danh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.