Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
tan toan » tan tran, van toan, dan toan
tap toan » tap quan, bai toan
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - hanh tranh cua cong cong ((tan toan) or (((tap toan) OR (tap doan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh tranh cua cong cong ((tan toan) OR (((tap toan) OR (tap doan)))) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh tranh cua cong cong ((tan toan) or (((tap toan) OR (tap doan)))) cao".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh tranh cua cong cong ((tan toan) or (((tap toan) OR (tap doan)))) cao*.