Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tuong cua » truong cua, huong cua, thong cua
nong cong » cong cong, tong cong, nang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
tung cua » trung cua, dung cua, tang cua
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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 manh - thanh ((tung cua) or (tuong cua)) nong cong tan ((than cau) OR (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh ((tung cua) OR (tuong cua)) nong cong tan ((than cau) OR (than cap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh ((tung cua) or (tuong cua)) nong cong tan ((than cau) OR (than cap))*".