Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
thanh tung » thanh cong
thuong con » thuong dong, truong cong, thong cong
doi chieu » doc hieu, doi chi, mot chieu
trinh san » trinh han, trinh quan, trinh toan
ho chieu » theo chieu, hoc thieu, mot chieu
tung cua » trung cua, tuong cua, dung cua
san cao » san co, san cho, san bao

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 (ho chieu)) tinh - thanh tung cua ((thuong cong) OR (thuong con)) trinh san cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) tinh - thanh tung cua ((thuong cong) OR (thuong con)) trinh san cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) tinh - thanh tung cua ((thuong cong) OR (thuong con)) trinh san cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) tinh - thanh tung cua ((thuong cong) OR (thuong con)) trinh san cao*.