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