Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
tung dan » dung dan, trung dai, dung dat
luan cau » quan cau, lua cau, luat cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (theo chieu)) xanh - hanh tranh cua nhung ((tung dan) OR (huong dan)) luan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chieu)) xanh - hanh tranh cua nhung ((tung dan) OR (huong dan)) luan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo chieu)) xanh - hanh tranh cua nhung ((tung dan) OR (huong dan)) luan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chieu)) xanh - hanh tranh cua nhung ((tung dan) OR (huong dan)) luan cau*.