Perhaps you should try some spelling variations:
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
dung cong » dung trong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: doc ((hieu nganh) OR (hieu manh)) - thanh ((trung cua) or (truong cua)) dung cong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hieu manh)) - thanh ((trung cua) OR (truong cua)) dung cong van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) OR (hieu manh)) - thanh ((trung cua) or (truong cua)) dung cong van toan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) OR (hieu manh)) - thanh ((trung cua) or (truong cua)) dung cong van toan cau*.