Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hieu nganh » vien nganh, hiem ngan, nghiep nganh
truong cua » truong ca, truong quan, truong cao
hieu manh » chieu xanh, dieu hanh, hien hanh
trung cua » trung tuan, trung cap, dung cua
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) or (hieu manh)) - thanh ((trung cua) OR (truong cua)) phuong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hieu manh)) - thanh ((trung cua) OR (truong cua)) phuong cong dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (hieu manh)) - thanh ((trung cua) OR (truong cua)) phuong cong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (hieu manh)) - thanh ((trung cua) OR (truong cua)) phuong cong dan chan cau*.