Perhaps you should try some spelling variations:
chieu trach » chiu trach, chien tranh, chiet tach
hanh tranh » canh tranh, hanh trinh, hanh trang
dong luong » cong luong, dong duong, dong huong
tranh cua » doanh cua, manh cua
ho chieu » theo chieu, hoc thieu, doi chieu
cua dong » chua dong, cua cong, cua dang
bai toan » bai tap
van tai » von tai, van tuan

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 trach - hanh tranh cua dong luong ((bai toan) or (van tai)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu trach - hanh tranh cua dong luong ((bai toan) OR (van tai)) tap.
• Adding a wildcard symbol may retrieve word variants: ho chieu trach - hanh tranh cua dong luong ((bai toan) or (van tai)) tap*.