Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tuong cua » truong cua, huong cua, thong cua
toc hieu » toc thieu, doc hieu, hoc thieu
tung cua » trung cua, dung cua, tang cua
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

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