Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc lieu voi snippets" » "toc thieu voi snippets", "duoc lieu voi snippets", "tai lieu voi snippets", "toc lieu boi snippets", "toc lieu va snippets", "toc lieu hoc 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: (((("toc lieu 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: (((("toc lieu voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc lieu voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc lieu voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.