Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh dong » anh dong, ha dong
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
than tap » han tap, phan tap, than cap
toan tap » toan ban
dong va » dung va, dong ha, luong va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo tieu)) tinh - hanh dong va nhung cong san ((than tap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) tinh - hanh dong va nhung cong san ((than tap) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) tinh - hanh dong va nhung cong san ((than tap) or (toan tap))*.