Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don dam cua snippets" » "don tam cua snippets", "doi dam cua snippets", "don am cua snippets", "don dai cua snippets", "don day cua snippets", "don nam cua 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: (((("don dam cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don dam cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don dam cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don dam cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.