Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh quan » tinh quang, trinh luat, trinh han
chu quang » chat quang, vu quang
quan dang » quang dang, quan lang, quan dong
theo chu » theo chieu, cho chu, chao chu
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu quang - canh trinh quan dang ((cong tap) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu quang - canh trinh quan dang ((cong tap) OR (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chu quang - canh trinh quan dang ((cong tap) OR (cong tac)) toan cau*.