Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"van hanh data slippers" » "van thanh dat slippers", "van anh dat slippers", "van hanh cat slippers", "van thanh data slippers", "ban hanh data slippers", "van anh data slippers", "van hanh data slippery", "van hanh data grippers"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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: (((("using java code snippets") or ("van hanh data slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("van hanh data slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( van hanh data slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("van hanh data slippers"))) or ("locating bug code snippets"))*.