Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » hanh chinh
hieu cach » hieu cac, chieu sach, hieu ca
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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 cach - ((canh tranh) or (hanh trinh)) cua nhung cong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((canh tranh) OR (hanh trinh)) cua nhung cong ((van toan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((canh tranh) or (hanh trinh)) cua nhung cong ((van toan) or (van tuan)) cau*.