Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi dieu he snippets" » "thi lien he snippets", "thi hien he snippets", "vi dieu he snippets", "thi dieu che snippets", "thi dien he snippets", "thi hieu he 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: (((("thi dieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi dieu he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi dieu he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi dieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.