Perhaps you should try some spelling variations:
hanh trinh » canh tranh
luat dung » suat dung, luat chung, thuat dung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

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