Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu quoc cao snippets" » "phu quoc cao snippets", "tru quoc cao snippets", "thuat quoc cao snippets", "thu quoc bao snippets", "thu quoc cac snippets", "thu quoc cho 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 quoc cao 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 quoc cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu quoc cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu quoc cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.