Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu canh lee snippets" » "thuc hanh lee snippets", "thu cong lee snippets", "thu ban lee snippets", "thu manh le snippets", "thu anh le snippets", "thu cach le 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 canh lee 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 canh lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu canh lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu canh lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.