Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
wang jing » wang ning, wang liang, wang yang
trang van » trang vang, frans van
van hoang » tran hoang, vu hoang, anh hoang
hoang shu » hoang vu, cong shu, hoang sy
li trang » li zhang, bi trans, di trana
wan yan » wang yan, nan yan, wai yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan ((wang jing) or (yang liang)) li trang van hoang shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan ((wang jing) OR (yang liang)) li trang van hoang shu ;*.