Perhaps you should try some spelling variations:
nhanh dung » nhanh dong, hanh dung, nhanh hung
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
cua nhung » va nhung
theo chu » theo chieu, cho chu, chao chu
dung cua » dung luan, dung cho
tac tran » tan tran, tac trai, tac tren
rac tren » ran tren, tac tren, sach tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo chu)) tinh - nhanh dung cua nhung cong ((tac tran) or (rac tren)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chu)) tinh - nhanh dung cua nhung cong ((tac tran) OR (rac tren)) cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chu)) tinh - nhanh dung cua nhung cong ((tac tran) or (rac tren)) cao*.