Perhaps you should try some spelling variations:
trung thanh » truong thanh
thuong cong » thong cong, thuong con, thuong dong
chieu xanh » chieu sach, chieu sang, chieu tinh
trung phan » trung ha, dung phan, trung tuan
cong hang » cong thang, cong hung, cong lang
ho chieu » theo chieu, hoc thieu, doi chieu
kho khan » khoa kham, khoa than
hoa tan » hoa dan, hoa van, hoa tin

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 phan) OR (trung thanh)) thuong cong hang ((kho khan) or (hoa tan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh ((trung phan) OR (trung thanh)) thuong cong hang ((kho khan) OR (hoa tan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - thanh ((trung phan) OR (trung thanh)) thuong cong hang ((kho khan) or (hoa tan))".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((trung phan) OR (trung thanh)) thuong cong hang ((kho khan) or (hoa tan))*.