Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van lu canh snippets" » "van luc canh snippets", "van lu hanh snippets", "van luat canh snippets", "van du canh snippets", "van le canh 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: (((("van lu canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van lu canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van lu canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van lu canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.