Perhaps you should try some spelling variations:
trinh chua » trinh chuan, trinh cua, tinh chua
toan thanh » tran thanh, hoan thanh, toan thang
tiem hanh » tim hanh, tien thanh, liem thanh
tien hanh » tien thanh, hien hanh, tien anh
trinh chu » trinh cau, trinh cho, trinh thuc
dong cong » duong cong, dung cong, dang cong
cong toan » cong tan, cong hoan, cong tuan
thanh cau » thanh chau, thanh mau, nhanh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tiem hanh) or (tien hanh)) - hanh ((trinh chua) OR (trinh chu)) dong cong toan thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tiem hanh) OR (tien hanh)) - hanh ((trinh chua) OR (trinh chu)) dong cong toan thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tiem hanh) or (tien hanh)) - hanh ((trinh chua) OR (trinh chu)) dong cong toan thanh cau".
• Adding a wildcard symbol may retrieve word variants: theo ((tiem hanh) or (tien hanh)) - hanh ((trinh chua) OR (trinh chu)) dong cong toan thanh cau*.