Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
cau khoan » cac khoan, cuu khoa, cu khoa
khoan cap » khoan cam, khan cap, khoa cap
ho chieu » theo chieu, hoc thieu, doi chieu
cua tong » cua dong, cua nong, cua song
cong cau » cong cu, cong chuc, thong cau

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 xanh - hanh trinh ((cua tong) or (cua cong)) cong cau khoan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh trinh ((cua tong) OR (cua cong)) cong cau khoan cap.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh trinh ((cua tong) or (cua cong)) cong cau khoan cap*.