Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van thi chap snippets" » "van thi code snippets", "van thi phap snippets", "van thi cham snippets", "van thi cap snippets", "van tai chap snippets", "dan thi chap snippets", "van thu chap 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 thi chap 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 thi chap snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van thi chap snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thi chap snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.