Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
doi thoi » doi thoai, moi thoi, do thoi
tan toan » tan tran, tap toan, van toan
van tuan » van quan, van ban, anh tuan
doi thi » do thi, doi khi, doi thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi thi) OR (doi thoi)) binh - hanh trinh cua nhung cong ((tan toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi thi) OR (doi thoi)) binh - hanh trinh cua nhung cong ((tan toan) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi thi) OR (doi thoi)) binh - hanh trinh cua nhung cong ((tan toan) or (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((doi thi) OR (doi thoi)) binh - hanh trinh cua nhung cong ((tan toan) or (van tuan)) cau*.