Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
sinh qua » sinh quan, tinh quan, trinh qua
sinh cua » manh cua, dinh cuu, sinh va
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu nganh) OR (hieu manh)) - hanh ((sinh qua) OR (sinh cua)) dung cong danh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu nganh) or (hieu manh)) - hanh ((sinh qua) OR (sinh cua)) dung cong danh toan cau~".
• Adding a wildcard symbol may retrieve word variants: toc ((hieu nganh) or (hieu manh)) - hanh ((sinh qua) OR (sinh cua)) dung cong danh toan cau*.