Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
vinh toan » tinh toan, minh toan, vinh tran
hinh toan » tinh toan, thanh toan, trinh toan
ho chieu » theo chieu, doi chieu, mot chieu

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: ((ho chieu) OR (hoc thieu)) xanh - hanh tranh cua nhung cong ((vinh toan) OR (hinh toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - hanh tranh cua nhung cong ((vinh toan) or (hinh toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - hanh tranh cua nhung cong ((vinh toan) or (hinh toan)) cao*.