Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
nong van » nong dan, nong san, tong van
song van » hoang van, trong van, duong van
tan ban » toan ban, tang ban, van ban

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: ((doc hieu) OR (ho chieu)) xanh - hanh tranh cua cong ((nong van) OR (song van)) tan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) xanh - hanh tranh cua cong ((nong van) OR (song van)) tan ban~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - hanh tranh cua cong ((nong van) OR (song van)) tan ban*.