Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pho van cau snippets" » "ho van cau snippets", "phi van cau snippets", "tho van cau snippets", "pho van dau snippets", "pho van hau snippets", "pho van chat 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: (((("pho van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pho van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pho van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pho van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.