Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu tang » chieu sang, nhieu tang, chien thang
ho chieu » theo chieu, hoc thieu, doi chieu
doanh ca » doanh cua, doanh cao, danh ca
doanh va » doan va, doanh tai, doanh cua
cong dan » cong san, cong tan, huong dan
nhan tao » nhan dan
nhan tai » hang tai, van tai, toan tai

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 tang - canh ((doanh ca) OR (doanh va)) thuong cong dan ((nhan tao) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tang - canh ((doanh ca) OR (doanh va)) thuong cong dan ((nhan tao) OR (nhan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tang - canh ((doanh ca) OR (doanh va)) thuong cong dan ((nhan tao) or (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: ho chieu tang - canh ((doanh ca) OR (doanh va)) thuong cong dan ((nhan tao) or (nhan tai))*.