Perhaps you should try some spelling variations:
duong truong » duong trong, truong trung, tang truong
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
khoan cam » khoa cam, khoan va, phan cam
cong tai » cong thai, cong tac, cong tan
dong tai » dung tai, luong tai, cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - thanh tuong duong truong ((cong tai) OR (dong tai)) khoan cam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh tuong duong truong ((cong tai) OR (dong tai)) khoan cam".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh tuong duong truong ((cong tai) OR (dong tai)) khoan cam*.