Perhaps you should try some spelling variations:
wang liang » wang yang
liang oman » lang roman, liang dan, liang tan
can liang » yan liang, yang liang
oman oil » oman till, can oil, ogn oil
liang li » ling li, qiang li, liang wei
wang yue » wong yue, wang yan, wang he
oil can » oil cake, oil chad, oil coal

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang oman oil can liang li ((hong tan) or (((wang yue) or (wang hua)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang oman oil can liang li ((hong tan) OR (((wang yue) OR (wang hua)))) ;.
• Adding a wildcard symbol may retrieve word variants: wang liang oman oil can liang li ((hong tan) or (((wang yue) or (wang hua)))) ;*.