Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"mat dan hong snippets" » "mat dan code snippets", "mat dan phong snippets", "mat dan dong snippets", "mat dai hong snippets", "hat dan hong snippets", "luat dan hong snippets", "mat bang hong snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data 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: (((("mat dan hong snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mat dan hong snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( mat dan hong snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mat dan hong snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.