Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van cuc doi snippets" » "van cuc code snippets", "van duc doi snippets", "van luc doi snippets", "van cu doi snippets", "van cuoc doi snippets", "van cac doi snippets", "van cuc do snippets"
"python using java snippets" » "python using data 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 cuc doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van cuc doi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van cuc doi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van cuc doi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.