Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
khoa chau » khoai chau, khoa phau, khoa cham
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
hat chau » ha chau, hat nhan, huu chau
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((khoa chau) or (((hat chau) or (lai chau)))) tinh - hanh trinh cua nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((khoa chau) OR (((hat chau) OR (lai chau)))) tinh - hanh trinh cua nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: ((khoa chau) or (((hat chau) or (lai chau)))) tinh - hanh trinh cua nhung cong san van ban*.