Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
trinh van » trinh han, trinh toan, dinh van
dung cong » dung trong
chu tinh » chau tinh, chua tinh, chu tich
cong san » cong tac
san phan » san pham, van phan, sat phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chu tinh) or (cuu tinh)) - canh ((trinh van) or (trinh quan)) dung cong san phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chu tinh) OR (cuu tinh)) - canh ((trinh van) OR (trinh quan)) dung cong san phan dau.
• Adding a wildcard symbol may retrieve word variants: ho ((chu tinh) or (cuu tinh)) - canh ((trinh van) or (trinh quan)) dung cong san phan dau*.