Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu anh dong snippets" » "thu anh huong snippets", "thu anh son snippets", "thuy anh dong snippets", "thu canh dong snippets", "thu oanh dong 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 anh dong 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 anh dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu anh dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu anh dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.