Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri lieu du snippets" » "tai lieu du snippets", "thi lien du snippets", "tri lieu tu snippets", "tri lieu da snippets", "tri lieu de 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: (((("tri lieu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri lieu du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri lieu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri lieu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.