Perhaps you should try some spelling variations:
trinh van » trinh quan, trinh toan, dinh van
trinh han » trinh quan
cong cong » cong dong, trong cong, dung cong
cua tinh » va tinh, ha tinh, hoa tinh
cua sinh » hoa sinh, va sinh
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: moc ((cua tinh) or (cua sinh)) - canh ((trinh van) OR (trinh han)) cong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: moc ((cua tinh) OR (cua sinh)) - canh ((trinh van) OR (trinh han)) cong cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "moc ((cua tinh) or (cua sinh)) - canh ((trinh van) OR (trinh han)) cong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: moc ((cua tinh) or (cua sinh)) - canh ((trinh van) OR (trinh han)) cong cong dan than cau*.