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