Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hoan du snippets" » "thi hoan du snippets", "thu hoach du snippets", "thu ha du snippets", "thu hoang du snippets", "thu toan du snippets", "thu han 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 hoan 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 hoan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hoan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hoan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.