Perhaps you should try some spelling variations:
navigation services » sanitation services, sanitation service, information services
internet services » internet service
river navigation » air navigation
china internet » china integrated
supply china » supply chains, supply chain
supply river » supply side, supply water, supply sides

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply china internet services. ) or ( supply river navigation services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply china internet services. ) OR ( supply river navigation services. )).
• Adding a wildcard symbol may retrieve word variants: (( supply china internet services. ) or ( supply river navigation services. ))*.