Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
truong cua » truong ca, truong quan, truong cao
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
ban thanh » ban hanh, ban hang
van toan » van tuan, van tan, van thanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) tach - hanh truong cua nhung cong ((van toan) OR (ban thanh)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) OR (hoc thieu)) tach - hanh truong cua nhung cong ((van toan) or (ban thanh)) cao~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) OR (hoc thieu)) tach - hanh truong cua nhung cong ((van toan) or (ban thanh)) cao*.