Perhaps you should try some spelling variations:
"b resource developing countries problems." » "b resources developing countries problems.", "b resource development countries problems.", "b research developing countries problems.", "a resource developing countries problems.", "3 resource developing countries problems."
"web mine development community programs." » "web mine development community projects.", "web sme development community programs.", "web trade development community programs.", "web business development community programs.", "web money development community programs.", "webb mike development community programs.", "web site development community programs."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("b resource developing countries problems.") or ("web mine development community programs."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("b resource developing countries problems.") OR ("web mine development community programs."))*.
• Removing quotes may allow a broader search: (( b resource developing countries problems. ) or ( web mine development community programs. ))*.