Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat hoc voi snippets" » "nha hoc voi snippets", "chat hoc voi snippets", "nhan hoc voi snippets", "nhat hoc vi snippets", "nhat hoc vo snippets", "nhat 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: (((("nhat 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: (((("nhat hoc voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat hoc voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.