Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xac hoc voi snippets" » "bac hoc voi snippets", "cac hoc voi snippets", "xa hoc voi snippets", "xac hoc vi snippets", "xac hoc vo snippets", "xac hoc noi 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: (((("xac hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xac hoc voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xac hoc voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xac hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.