Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chat » tinh chat, trinh luat, trinh han
chat trong » nhat trong, thuat trong, chat luong
doi chieu » doc hieu, doi chi, mot chieu
cong san » cong tac
van chat » cao chat
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: ((toc thieu) or (doi chieu)) tinh - hanh trinh chat trong cong san van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (doi chieu)) tinh - hanh trinh chat trong cong san van chat*.