Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh lap » thanh san, phan lap, thanh hai
cua tong » cua dong, cua nong, cua song
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - thanh trung ((cua tong) OR (cua cong)) cong ban ((khan cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh trung ((cua tong) OR (cua cong)) cong ban ((khan cap) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh trung ((cua tong) OR (cua cong)) cong ban ((khan cap) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh trung ((cua tong) OR (cua cong)) cong ban ((khan cap) or (thanh lap))*.