Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
doi chieu » doc hieu, doi chi, mot chieu
hanh hang » thanh hang, hang hang, hanh han
va phuong » va thuong, cac phuong
ho chieu » theo chieu, hoc thieu, mot chieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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 (doi chieu)) tach - hanh hang va phuong cong san toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) tach - hanh hang va phuong cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) tach - hanh hang va phuong cong san toan cao*.