Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
nhung cong » dung cong, thong cong, hang cong
chau tinh » ha tinh, cua tinh, cac tinh
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van 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 ((chau tinh) OR (cuu tinh)) - canh ((trinh va) or (trinh toan)) nhung cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chau tinh) OR (cuu tinh)) - canh ((trinh va) OR (trinh toan)) nhung cong dan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chau tinh) OR (cuu tinh)) - canh ((trinh va) or (trinh toan)) nhung cong dan phan dau".
• Adding a wildcard symbol may retrieve word variants: ho ((chau tinh) OR (cuu tinh)) - canh ((trinh va) or (trinh toan)) nhung cong dan phan dau*.