Perhaps you should try some spelling variations:
khanh thanh » nhanh thanh, thanh thanh, phan thanh
thanh phan » thanh pho, thanh san, thanh toan
phan trong » pham trong, nhan trong, phan tong
trong long » trong luong, truong long, trong cong
doi chieu » doc hieu, doi chi, mot chieu
long span » cong san, dong san, nong san
span van » san van, luan van, tran van
van chat » cao chat

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 - khanh thanh phan trong long span van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (doi chieu)) tinh - khanh thanh phan trong long span van chat*.