Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using low snippets" » "python using code snippets"
"cac toc trinh snippets" » "cac doc trinh snippets", "cac hoc trinh snippets", "cac tra trinh snippets", "cac toi trinh snippets", "cac nuoc trinh snippets", "cac thoi trinh 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: (((("cac toc trinh snippets") or ("python using low snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac toc trinh snippets") OR ("python using low snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cac toc trinh snippets ) or ( python using low snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac toc trinh snippets") or ("python using low snippets"))) or ("locating bug core snippets"))*.