Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thach ham so snippets" » "thach lam so snippets", "thanh pham so snippets", "thanh cham so snippets", "thach nam so snippets", "thach cham soc 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: (((("thach ham so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thach ham so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thach ham so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thach ham so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.