Perhaps you should try some spelling variations:
dong phuong » duong phuong, dung phuong, dong huong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh chua » tranh cua, trinh chuan, tranh chap
trinh toan » tinh toan, thanh toan, trinh quan
chua dong » cua dong, ha dong, huy dong
trinh han » trinh quan
doc hieu » hoc thieu, hoc hien

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 (toc thieu)) sang - hanh tranh chua dong phuong ((trinh toan) OR (trinh han)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - hanh tranh chua dong phuong ((trinh toan) OR (trinh han)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) sang - hanh tranh chua dong phuong ((trinh toan) OR (trinh han)) tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sang - hanh tranh chua dong phuong ((trinh toan) OR (trinh han)) tap*.