Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van cheo cua snippets" » "van cho cua snippets", "ban cheo cua snippets", "van chien cua snippets", "van chuoi cua snippets", "van co cua snippets", "van chat cua 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: (((("van cheo cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van cheo cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van cheo cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van cheo cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.