Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
luat dung » suat dung, luat chung, thuat dung
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, doi chieu, mot chieu
ban than » ban thanh, ban hang, ban hanh

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 (hoc thieu)) xanh - canh trinh luat dung cong ((ban than) OR (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh trinh luat dung cong ((ban than) OR (van thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - canh trinh luat dung cong ((ban than) OR (van thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - canh trinh luat dung cong ((ban than) OR (van thanh)) cau*.