Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
cua sinh » hoa sinh, va sinh
trang va » hang va
tran van » luan van
cong san » cong tac
san can » san van, ban can, san chang
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chau tinh) or (cua sinh)) - hanh ((trang va) OR (tran van)) nhung cong san can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chau tinh) OR (cua sinh)) - hanh ((trang va) OR (tran van)) nhung cong san can cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chau tinh) or (cua sinh)) - hanh ((trang va) OR (tran van)) nhung cong san can cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chau tinh) or (cua sinh)) - hanh ((trang va) OR (tran van)) nhung cong san can cau*.