Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
va phuong » cac phuong
tan khoan » toan khoan, tai khoan, tao khoang
khoan cam » khoa cam, khoan va, phan cam
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh

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 - thanh trung ((va phuong) OR (va thuong)) cong tan khoan cam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - thanh trung ((va phuong) OR (va thuong)) cong tan khoan cam".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh trung ((va phuong) OR (va thuong)) cong tan khoan cam*.